You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Donna Thompson.

ASSISTANT: How can I help you Donna?

USER: Due to a sudden death of my friend, my trip is cancelled.

ASSISTANT: That's so sad to hear.

USER: Could you help me in cancelling the ticket?

ASSISTANT: Yes, I will help you with that. Sorry, there is no reservation found.

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

ASSISTANT: Thank you, have a nice day.