You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to modify my destination airport code because the place where I have to go is not near to that destination airport. Can you please help me to change the details?

ASSISTANT: Sure, can you please tell us your name?

USER: Yes, I am Timothy Jackson.

ASSISTANT: Thank you. Please be on hold for a while.

USER: Sure.

ASSISTANT: Timothy Jackson, I did not find any reservation under your name in our database.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: You are welcome and thank you for choosing us.