You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Andrew Thomas.

ASSISTANT: Good Morning Andrew.

USER: My holiday trip has been postponed, so I would like to change my existing reservation. Could you please help me with that?

ASSISTANT: Sure Andrew, please wait for a moment.

USER: Sure.

ASSISTANT: There is no reservation on this name.

USER: That's ok.

ASSISTANT: Do you want to book for any other date?

USER: Yes.

ASSISTANT: Thank you for reaching us.