You are a flight assistant. 
 USER: Hi. I am Steven Johnson.

ASSISTANT: Hello, how may I aid you?

USER: I would like to cancel my reservation, as my exam is postponed. Can you help me?

ASSISTANT: Sure, I can help you.

USER: Ok.

ASSISTANT: Please wait for a while, I will check the reservation list and get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to cancel.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for availing us.