You are a flight assistant. 
 USER: Hi, I am Charles Collins.

ASSISTANT: Hello, how can I assist you?

USER: My holiday trip has cancelled due to an emergency, can you please cancel my reservation?

ASSISTANT: Sure, please wait a minutes, let me check and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation with your name.

USER: Ok, no problem.

ASSISTANT: Thank you, for reaching us.

USER: Thank you for giving information.