You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me in this?

ASSISTANT: Sure, may I know your name to proceed?

USER: Ok, my name is Rebecca Williams.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: Ok, that's fine. Not a big problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your appreciable service.