You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Due to heavy rain, I want to cancel my reservation. Can you help me?

ASSISTANT: Sure, could I have your name please?

USER: Christopher Nelson here.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation with your name in our portal to cancel further.

USER: No problem, Thanks for the information.

ASSISTANT: You are welcome.