You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you today?

USER: I want to book a ticket from DFW to PHL to attend seminar, can you help me in booking?

ASSISTANT: Sure, please share me your travel dates.

USER: I am departing on Sep 19 and return on Sep 21.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: My name is Deborah Clark.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I prefer a connecting flight.

ASSISTANT: May I know your class preferences?

USER: I am ok with any class.

ASSISTANT: We found a Southwest airline and 1004 is flight number with a fare of 200. Shall I proceed?

USER: Please proceed for booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.