You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for today?

USER: My name is Robert Thomas.

ASSISTANT: OK.

USER: Due to a sudden meeting, my trip is cancelled. Could you help me in cancelling the reservation?

ASSISTANT: OK Robert, please wait for a moment.

USER: OK.

ASSISTANT: Thank you for waiting Robert, there is a no reservation found on your name. Thank you approaching us.

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

ASSISTANT: You are welcome.