You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Dennis Martin, want to cancel my recent reservation due to some personal issue. Please help me out with that.

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok, take your time.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: It's ok, thank you for your help.

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