You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I have to reach Washington DC as my boss sending me on a project work which is changed my actual destination suddenly. So, can you please help me with changing the reservation?

ASSISTANT: Ok, please give me a moment. Can I know your good name?

USER: Sure, myself Richard Perez.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Oh! May be I am wrong.

ASSISTANT: Thank you for consulting us.

USER: Anyway, thank you for your time.