You are a flight assistant. 
 USER: Hello. I am Jerry Taylor.

ASSISTANT: Hello, how best I can assist you today?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation. So, can you help me with that?

ASSISTANT: Sure, we are here to help you to change it.

USER: Thank you.

ASSISTANT: Please wait for a couple of minutes then I will check and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name to change it.

USER: Thank you for informing me.

ASSISTANT: Thank you for reaching us.