You are a flight assistant. 
 USER: Hello, I am Donald Campbell.

ASSISTANT: Hello, how may I assist you?

USER: Due to my holiday trip has been cancelled, I am not able to attend to my destination. Can you please help me for cancellation?

ASSISTANT: Sure, please stand by I will check and revert you.

USER: Sure.

ASSISTANT: Thank you, sorry no reservation found with your name.

USER: Ok, no issue. Thanks for your service.

ASSISTANT: Have a nice day.