You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dorothy Young.

ASSISTANT: How may I aid you?

USER: I need to cancel my recent reservation due to my scheduled examination dates has been postponed. Can you please help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check your reservation status.

USER: Ok, I will wait for your information.

ASSISTANT: Dorothy, no reservation has been found on your name in our database to cancel your reservation.

USER: That's ok, no problem. Anyway thank you for checking.

ASSISTANT: Thank you for choosing our agency.