You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please help me for existing reservation?

ASSISTANT: Sure, I will help you. Can I know the name on which the reservation has been done?

USER: Sure, I am James Smith here.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry Smith. there is no reservation available on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: You are welcome.