I don't think I look myselflike an English speaking person myself.

I'm sure I look myself Asian no matter who looks at me.

Whilen I was trying to measure the weight of my luggage, aone of the ground staff talked to me and said "One person?"

"Staff" usually means a group of people who work somewhere. You can say "one of the staff members" or you can address them as a single person (maybe "an employee" or "a check-in counter worker").

I was a little bit surprised because she talked to me in Englishy that.

You already wrote that she used English, so it's a bit redundant to say it again.

I don't think I look myself an English -speaking person.

I'm sure I look myself Asian, no matter who looks at me.

I wonder if she thought I was Chinese or Korean.

She very well might have, especially at an airport.

I want to know how to say どう見ても私はアジア人に見える in English.

"No matter how you look at it, I look Asian."

I don't think I look myselflike an English speaking person.

I'm sure I look myself Asian no matter whoeveryone who looks at me would think I look at meAsian.

When I was trying to measure the weight of my luggage, a member of the ground staff talspoked to me and saiasked "One person?"

I wondered if there's a rule to talk to people in English first. (in an airport)

I don't think I look myselflike an English speaking person.

I'm sure I look myself Asian, no matter who looks at me.

When I was at the Kansai Airport, I had an interesting experience.

I was a little bit surprised because/that she talked to me in English.

I don't think I look myselflike an English speaking person.

I'm sure I look myself Asian no matter who looks at me.

Last week, I went to Osaka last week.

Though either way work, this feels more slightly less tense

When I was at Kansai Airport, I had an interesting experience. at the Kansai Airport,

When Iile was trying to measure the weight of my luggage, a ground staff talspoked to me and said "One person, saying "Are you by yourself?"

I was a little bit surprisfrazzled because she talked to me in English.

Surprised: "Whoa, I completely didn't see that coming!"
Frazzled: "Whoa, I completely didn't see that coming and am very *confused* by what just happened"
Just adds a bit more style to you're writing

in English, but I also said "三人です” in Japanese becaussince she looked Japanese.

I wondered if there's a rule tohat makes the Ground Staff talk to people in English first.

I don't think I look myself anthe typical English speaking person.

I'm sure I look myself Asian no matter who look at me.it's quite obvious that I'm Asian.

I want to know how to say どう見ても私はアジア人に見える in English.

"I'm clearly asian, and there's no two ways about it" is a good way to どう見ても私はアジア人に見える

When I was aAt Kansai Airport, I had an interesting experience.

WhenAs I was trying to measure the weight of my luggage, a ground staff talked to me and saidmember asked me in English, "One person?"

in English.

I was a little bit surprised because she talspoked to me in English.

I said "No, wthere are three of us."

I wondered if there'swhether there may be a rule to talk toaddress people in English first.

I don't think I look myselflike an English speaking person.

I'm sure I look myself Asian, no matter who looks at me.

I want to know how to say どう見ても私はアジア人に見える in English.

There are already plenty of corrections on this so I'll just look at this line.

So, my J-E dictionary suggests for どう見ても, "to all appearances" and "no matter how you look at it".

"To all appearances" actually feels a bit weird to me, though. "By all appearances" sounds a bit better. Though, unless どう見ても is idiomatic and doesn't mean what I think, I think "no matter how you look at it" is more accurate.

When I read your text "no matter who look*s* at me," the more idiomatic phrase "anyone can tell" came to mind. (Tell as in 区別できる・見分ける in this case.) "Anyone can tell that I'm an Asian person!"

When I was trying to measure the weight of my luggage, a ground staff member talked to me and said, "One person?"

I said "No, we are three."

"There are three of us" is the natural way to say it.

I don't think I look myselflike an English speaking person.

I'm sure I look myself Asian no matter who looks at me.

I want to know how to say どう見ても私はアジア人に見える in English.

A natural way to say it in English is "I look obviously Asian." "Anyone can tell that I'm Asian" is also good.

ALSO POSSIBLE: When I was at Kansai Airport, I had an interesting experience occured.

The original is possible. However, repeating the word "I" twice is not elegant. (It is fine when speaking, but written English is somewhat from spoken English.)

When I was trying to measure the weight of my luggage, a ground staff talked to me and saidinquired/enquired, "One person?"

NOTE: In American English "inquire" is more common. In the U.K. spelling "enquire" is sometimes used. (Cf. https://www.grammarly.com/blog/inquire-enquire/ )

BETTER: I said "No, we are threethree persons in our party."

I went to Osaka last week., and while I was at…. experience

Since your English is quite good, I would use longer more complex phrases instead of shorter sentences. They are both correct, but a native speaker would combine them :)

WhenAs I was trying to measure the weight of my luggage, a ground staff talstaff person spoked to me and said "One person?"

You could also say ‘As I was trying to weigh my luggage’. Ground crew is typically used for the people who are out on the tarmack waving the flashlights and directing the planes to park.

I was a little bit surprised because she talspoked to me in English.

Spoke vs talk in English is tricky: Speak usually only focuses on the person who is producing the words: He spoke about the importance of taking exercise and having a good diet. Talk focuses on a speaker and at least one listener, and can mean 'have a conversation': I hope I can meet you to talk about my plans for the company.

Speak or talk ? - Grammar - Cambridge Dictionary

I said "No, wthere are three." of us”

We are three is unusual to say in english, and would generally not be said by a native speaker.

I don't think I look myselflike an English speaking person.

You could also say, ‘I, myself don’t look like an English speaking person’ but it is clunky.

I'm sure I look myself Asian no matter who looks at me.

You could also say ‘is looking’