You are a flight assistant. 
 USER: Hello. I am Jack Adams.

ASSISTANT: Hello, how may I aid you?

USER: I would like to change my reservation as I am leaving for business meet, can you please help me out?

ASSISTANT: Sure. we are here to help you. Ok, please wait a moment.

USER: Thank you. Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.