You are a flight assistant. 
 USER: Hi. I am Sharon Edwards.

ASSISTANT: Hello, How can I serve you?

USER: I need to cancel my reservation as my exams postponed, can you please help me?

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.