You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Michelle Harris here.

ASSISTANT: Harris, how may I aid you?

USER: Can you cancel my flight ticket reservation? As my travel dates for my family vacation has been postponed to some other date in New York.

ASSISTANT: Sure, please wait for a while. Let me check your reservation status.

USER: Ok.

ASSISTANT: Sorry Harris, I did not find any reservation under your name in our database.

USER: Ok, that is not a problem. Thanks for your information.

ASSISTANT: You are welcome and thank you for choosing us.