You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Paul Williams, please help me with changing my reservation as my exam got postponed.

ASSISTANT: Sure, please wait  a moment.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Fine, thanks for the information.

ASSISTANT: Thanks for reaching us, have a good day.