You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: May I know your name?

USER: Check under the name Gregory Robinson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.