You are a flight assistant. 
 USER: Hi. I am Mark Jones.

ASSISTANT: Hello, How can I aid you?

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

ASSISTANT: Sure, I am perky to help you.

USER: Thank you.

ASSISTANT: Please stand by. I will check and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation on your name to cancel it.

USER: Not a problem, thank you.

ASSISTANT: Thank you for opting us.