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 help me to change my recent reservation?

ASSISTANT: Sure, please help me with your good name please?

USER: Sure, my name is Jacob Adams.

ASSISTANT: There is no existing reservation found on your name. Thank you for opting us.

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