You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: William Moore here. I want to cancel my recent reservation due to postpone of my exams. Can you help me in that?

ASSISTANT: Sure, let me check in our database.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, I did not find the reservation by your name in our database.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for connecting us.