You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jonathan Carter and I need some help in booking a flight ticket . Can you help me?

ASSISTANT: Sure Jonathan, can I know the source and destination details?

USER: Yes, my airport codes are from PA-PHL to NY-EWR.

ASSISTANT: OK, could you help me with the travelling dates?

USER: Sure, my journey dates would be 07/16 and returns on 07/18.

ASSISTANT: OK. Can I know is there any price limit?

USER: Yes, the price limit is 5000.

ASSISTANT: Can I know is there any connection limit?

USER: And there should  be 1 limit of connection.

ASSISTANT: OK, I had found a flight matching your requirement. The flight number is 1000 of southwest airlines.

USER: OK, please proceed with the booking.

ASSISTANT: OK.

USER: Thank you for booking and helping me out.

ASSISTANT: Thank you for reaching us.