You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Usually I prefer a connecting flight, but unfortunately my friend has already reserved my ticket with a direct flight. So, I want to change it. Can you please help me with this?

ASSISTANT: Sure, we are glad to help you to change it. To proceed further,  help me with your name to find a reservation of your's.

USER: Sure, I am Sandra Robinson.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no active reservation found under your name to do modifications in that.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for availing our service.