You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

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

ASSISTANT: Sure, I am here to help you. Can you help me with your name?

USER: Sure, my name is Jeffrey Young.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's fine. Thank you for your service.

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