You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I have to change my flight ticket reservation on the name Sandra Edwards, can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry Edwards, there is no active reservations under your name.

USER: Ok, thank you for your immediate service.

ASSISTANT: Most welcome.