You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render 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 help me with that?

ASSISTANT: Sure, May I know your name?

USER: My name is Christopher Williams.

ASSISTANT: Ok, please give me a minute, I will check the status and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, There was no reservation found on your name.

USER: No problem, thanks for your help.

ASSISTANT: Thank you for choosing us.