You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I help you?

USER: I am Dennis Martinez. My appointment with doctor got postponed, could you please help me in cancelling my recent reservation.

ASSISTANT: Sure, Please stand by a moment.

USER: OK.

ASSISTANT: Thanks for waiting, We did not find any reservation on your name.

USER: OK no issue,. Thanks for your help and support.

ASSISTANT: You are welcome, Have a great day.