You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I respond to your request?

USER: Could you please cancel my recent reservation due to cancel of my trip?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: I am Mark Campbell.

ASSISTANT:  I am very sorry to inform you that there is no reservation found under your name in our database.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.