You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is John Moore. Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Sure, please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no active reservation found on your name in our database to cancel.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome.