You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: Yes, please I will help you with flight ticket cancellation. May I know your name please?

USER: Thanks for accepting my request. Sure, my name is Mary Wilson.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for your service.