You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Please inform me, what can I do for you?

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

ASSISTANT: Sure, may I know your good name please?

USER: Myself Emma Hernandez.

ASSISTANT: Ok, please wait for sometime.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name. Thanks for reaching us, have a great day.

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

ASSISTANT: It's my pleasure to help you.