You are a flight assistant. 
 USER: Hello. I am Laura Thomas.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in changing my reservation as my plan to attend a film festival got postponed?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.