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: Sure, we are here to help you. May I know your name please?

USER: Larry Hernandez here.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name. Thank you for contacting us.

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