You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

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

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My travelling dates are Dec 19 and Dec 21.

ASSISTANT: May I know your airport codes of journey please?

USER: My airport codes are LAX and PHL.

ASSISTANT: Do you have any connection limit preference?

USER: I prefer single connecting flight.

ASSISTANT: Do you have any other specifications for this trip?

USER: I prefer normal cost airline.

ASSISTANT: May I know your name to proceed further?

USER: My name is David Martin.

ASSISTANT: American Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 20:00 hours and arrives at 7:00 hours, shall I book your ticket in this flight?

USER: Please proceed.

ASSISTANT: David Martin, your ticket is booked in flight number 1007.

USER: Thanks for helping me.

ASSISTANT: You are welcome and have a safe journey.