You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to change my reservation, can you please help me out with that?

ASSISTANT: Sure. May I know your name please?

USER: Alexander Thomas here.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for your time. Sorry I could not find your flight reservation to change it.

USER: Ok, no issues. Anyway thank you for checking out.

ASSISTANT: Thank you.