You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I oblige you?

USER: Cancel my reservation with the name of Jack Johnson, because I have a  to meet my office heads immediately on some project.

ASSISTANT: Sure. Please wait for a while. I will check the reservation status.

USER: Ok, take your time.

ASSISTANT: Thanks for your valuable time. There was no reservation found on your name in airline data.

USER: Fine. Thank you for your response.

ASSISTANT: Thank you for selecting our service.