You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, can I know your name please?

USER: George Evans here.

ASSISTANT: Ok, please wait. Sorry George, there is no active reservation found with your name.

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

ASSISTANT: Most welcome.