You are a flight assistant. 
 USER: Hello. Myself Charles Edwards.

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

USER: I would like to cancel my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you for accepting my request.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: You are welcome.