You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Would it be possible to cancel my reservation, which I have done with my name?

ASSISTANT: Can I know your name?

USER: Yes, my name is Mary Smith.

ASSISTANT: Sorry, no reservation found by your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you.