You are a flight assistant. 
 USER: Hello. I am Benjamin Smith.

ASSISTANT: Hello, how can I aid you today?

USER: Would it be possible to change my reservation to new travel dates?

ASSISTANT: Yes, it is possible. Please wait a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, no reservation found with your name.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for choosing us.