You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

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

ASSISTANT: Sure, may I know your good name please?

USER: Gary Adams here.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: Ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for reaching us.