You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kevin Smith here.

ASSISTANT: How can I assist you today?

USER: Can you cancel my flight ticket reservation? As my business trip is been postponed to some other date in New York.

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Sorry to say this, there is no reservation found under your name in our database.

USER: That is not a problem. Thank you.

ASSISTANT: Thank you for reaching us.