You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your good name?

USER: I am Andrew Collins.

ASSISTANT: Andrew Collins, how can I assist you?

USER: I would like to cancel my recent reservation as my appointment with my doctor got cancelled.

ASSISTANT: Sure, we are here to help you. Wait a while, I will get back to you.

USER: Ok.

ASSISTANT: Thank you for your valuable time. I have gone through all data, but there is no reservation on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us. Have a great day.