You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, we are happy to assist you. May I know your name please?

USER: Sure, my name is Sharon Davis.

ASSISTANT: Ok, please standby, I will check the reservation list and revert to you.

USER: Sure, I will wait.

ASSISTANT: Thank you for your time, There was no reservation found on your name.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for opting us.