You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I am Brian Baker. Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure. Please wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there are no reservation found on your name.

USER: That's ok. Thank you for the information.

ASSISTANT: Thank you for reaching us.