You are a flight assistant. 
 USER: Hello,.

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

USER: My girl friend wants to book a flight ticket, her name is Helen Allen.

ASSISTANT: Sure, let me know the travelling details?

USER: She wants to travel from PA-PHL on 01/27 and return to GA-ATL on 01/29.

ASSISTANT: Is there any other specifications?

USER: Please make sure that price limit is 1000 and one connection only.

ASSISTANT: It is good to inform that We found a flight with your requirements. Flight number: 1005, airline : Southwest and price limit is 200 with one connection. Shall I proceed with booking?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Have a safe journey.