You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: May I know your name?

USER: Stephen Lewis here.

ASSISTANT: Sorry, no reservation found on your name.

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

ASSISTANT: Thank you.