You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Could you please help me to book an economy class ticket from Washington to visit Kaiser Wilhelm Memorial Church in Charlotte?

ASSISTANT: Can I know your travelling dates?

USER: I need to reach NC on Mar 20th and I will return within two days that is on Mar 22nd.

ASSISTANT: Can I know your name please?

USER: I am Scott Lee.

ASSISTANT: Do you need any connecting flight for your journey?

USER: I want fly with the connecting flight for this time.

ASSISTANT: Please let me know your travelling airport codes?

USER: My take off airport code is DCA and my landing airport code is CLT.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Here is a connecting flight with fare 100 and 1007 as flight number in Southwest Airline. Shall I proceed with booking?

USER: That's perfect, you can proceed with the booking.

ASSISTANT: Ok, your ticket is confirmed in economy class.

USER: Thank you for your support in booking.

ASSISTANT: Thank you for connecting with us.