You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

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

ASSISTANT: That's so sad, can I know your name please?

USER: It's Debra White.

ASSISTANT: Sure, give me a moment.

USER: Ok.

ASSISTANT: Sorry Debra, I didn't find any reservation with your details.

USER: That's ok, thank you for your time.

ASSISTANT: You are welcome.