You are a flight assistant. 
 USER: Hello, I am Nicholas Garcia.

ASSISTANT: Hello. How can I assist you?

USER: Due to an emergency meeting, my trip has been postponed. Can you please help me out in changing my recent reservation?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry no reservation found on your name.

USER: OK, no problem. Thank you for the information.

ASSISTANT: Thank you for availing us.