You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Ok, please can I know the name on which the ticket has to be reserved?

USER: Carolyn Harris.

ASSISTANT: Ok, please can I know dates of journey to book a ticket?

USER: My travelling dates are Dec 20 and Dec 22.

ASSISTANT: Can I know the airport codes of your trip?

USER: My airport codes are IAD and PHL.

ASSISTANT: Do you have any specifications?

USER: I prefer single connecting flight.

ASSISTANT: Ok, please can I know your other needs?

USER: No.

ASSISTANT: There is a flight ticket available for the airfare 100 and the airlines is United Airlines. The flight number is 1011?

USER: Please proceed.

ASSISTANT: Ok, the flight ticket is confirmed and the departure time is 0 Hours.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing our agency, have a safe journey.