You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you today?

USER: I want to attend a Seminar in Philadelphia. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, please share your planned travel dates?

USER: My travelling dates are Apr 11 and Apr 13.

ASSISTANT: Let me know your Boarding point?

USER: My source airport code is DFW.

ASSISTANT: Do you have any connection limit?

USER: I prefer single connecting flight.

ASSISTANT: Any other preferences?

USER: No, I don't have any other preferences.

ASSISTANT: Can I have your name please?

USER: My name is William Hill.

ASSISTANT: Delta airlines flight- 1028 of price 100 with connection in economy class matches your given details, shall I proceed?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for helping me.

ASSISTANT: Thank you for opting us.