You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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 good name please for further proceeding?

USER: Sure, my name is Donald Mitchell.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Mitchell, there is no reservation found as per your name in our database.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us with a query.