You are a flight assistant. 
 USER: Hi. I am Gary Hall.

ASSISTANT: Hello, how can I help you?

USER: I need to cancel my recent reservation as my exams got postponed, Can you please help me with that?

ASSISTANT: Sure, we are here to help you. Please wait a moment, I will check your details and get back to you.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for contacting us.