You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: At last minute my meeting got cancelled which is scheduled earlier, I made a booking earlier for that meeting. So, now please help me to cancel my reservation.

ASSISTANT: Sure, we are euphoric to help you.

USER: Thank you.

ASSISTANT: May I know your name to trace your details?

USER: Sure, you can check the reservation on the name of Steven Baker.

ASSISTANT: Please allow me a moment to check the previous reservation in our data base.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for your precious time. I regret, no reservation exist on the name of Steven Baker.

USER: Ok. Thank you for your help.

ASSISTANT: Thank you for approaching us.