You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I would like to modify the landing airport code in my previous ticket. Could you please help me to do that?

ASSISTANT: Sure, I will help you in changing the reservation. May I know your name please?

USER: Thank you for accepting my request. My name is George Young.

ASSISTANT: Sorry, I could not found any reservation on your name.

USER: It's ok, not an issue with that.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking my ticket status.