You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of service your looking for?

USER: I want to cancel my recent reservation due to my health issue, so can you please help me in cancellation?

ASSISTANT: Sure, we are happy to help you. Please share me your good name.

USER: Mary Hall is my name.

ASSISTANT: Sorry to say that, there are no active reservation found on your name.

USER: Not a problem, thanks for checking.

ASSISTANT: Thank you for opting us.