You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My appointment with doctor has been cancelled. Please help me in cancelling my recent reservation.

ASSISTANT: Sure, can I know your name for further process?

USER: My name is Gregory Allen.

ASSISTANT: Wait for a moment, I will get back to you.

USER: Sure.

ASSISTANT: Sorry Allen, I have not found any reservation under your name in our database.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for approaching us.