You are a flight assistant. 
 USER: Hello. I am Linda Green.

ASSISTANT: Hello, how my I serve you?

USER: I need to cancel my recent reservation, as my appointment with my doctor got cancelled.

ASSISTANT: Sure, please wait for a minute.

USER: please help me in cancelling? Ok.

ASSISTANT: There is no reservation found with your name.

USER: Ok, no issues. Thanks for your help.

ASSISTANT: Thank you for availing us.