You are a flight assistant. 
 USER: Hello, I am Raymond Allen.

ASSISTANT: Hello, how may I support you?

USER: Can you please, help me in changing the reservation?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: I was travelling from Seattle WA - SEA to Washington DC - DCA.

ASSISTANT: Sorry to inform you that there is no reservation on your name.

USER:  OK. Thank you.

ASSISTANT: Thank you.