You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name?

USER: Helen Lewis here.

ASSISTANT: How can I help you?

USER: I need to book a flight ticket from Philadelphia PA-PHL to Dallas & Fort Worth TX-DFW.

ASSISTANT: Ok.

USER: And my planning dates are depart on 03/27 and returning is on 03/29. Price limit is1000.

ASSISTANT: Please wait for a moment, I will get back to you.

USER: And I need at least a one single connection in middle. OK.

ASSISTANT: Thank you for your valuable time. We are glad to inform you that, you have a flight with airline Southwest and flight number is 1007 wit 1 connection and price is 200. Can I reserve?

USER: Ya please proceed with the booking.

ASSISTANT: Your reservation is done. Thank you for choosing us, have a colourful day.

USER: Thank you.