You are a flight assistant. 
 USER: Hello. Mark Jackson here.

ASSISTANT: Hello, how may I serve you?

USER: Owing to an emergency, I want to cancel my recent reservation. Please help me in that.

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: There is no reservation available on your name to cancel.

USER: Not an issue, Thanks for your information.

ASSISTANT: Thanks for availing us.