You are a flight assistant. 
 USER: Hello. I am Lisa Carter.

ASSISTANT: Hello, how can I serve you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me in cancelling reservation?

ASSISTANT: Sure, please wait a moment I will check and let you know.

USER: Sure.

ASSISTANT: Sorry, we did not found reservation on your name.

USER: Ok, No problem. Thanks for the information.

ASSISTANT: Thank you for reaching us.