You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Stephen Perez. I had planned to go on a vacation, but it was cancelled.Can you cancel my  recent reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Perez, there is no reservation is found as per your details to cancel your reservation.

USER: That's fine.

ASSISTANT: Thank you for your service.

USER: Thank you for your help.