You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I am passionate about wild life  photography and I need to visit San Francisco zoo, can you help me to book a direct flight?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to depart on 03/04 and I intend to return on 03/06.

ASSISTANT: May I know your source and destination?

USER: My boarding point is GA-ATL and my destination is CA-SFO.

ASSISTANT: May I know your price limit?

USER: I need the ticket with in the price limit 500.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, there is no direct flights were available with your details.

USER: Ok, thanks for your information.

ASSISTANT: May I know your good name?

USER: I am Robert Edwards.

ASSISTANT: Thank you, for choosing us.