You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Stephen Nelson.

ASSISTANT: Nice meeting you Nelson.

USER: I have already booked my ticket to Boston but due to an emergency, my trip got postponed.

ASSISTANT: Sorry Nelson, there is no reservation found with your name in our records.

USER: That's fine. Thank you for your time.

ASSISTANT: It's my pleasure.