You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. By what way can I assist you now?

USER:  I have an earlier reservation to sign a new contract with my client, due to some problems it got postponed.

ASSISTANT: Ok.

USER: Can you do the changes in my reservation?

ASSISTANT: Sure, I will do. To check your previous reservation, may I know your name?

USER: Scott Campbell here.

ASSISTANT: Sorry, there was no reservation on your name.

USER: No problem, Thank you.

ASSISTANT: Thank you for availing us.