You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you now?

USER: I am Joseph Moore. I want to book a flight ticket to Philadelphia, PA - PHL, for a family function. Can you help me in booking a flight ticket?

ASSISTANT: Sure, I will assist you.

USER: Thank you.

ASSISTANT: May I know your journey dates?

USER: Sure, I want to start from 02/22, and I will return on 02/24.

ASSISTANT: Help me with the source code?

USER: Ok, my source code is Orlando, FL - MCO.

ASSISTANT: Do you have any price limit?

USER: My price limit is 200.

ASSISTANT: Thank you for your details, we found a flight in an airline UA of number 1004 with a price of 100. Shall I proceed to book?

USER: I am comfortable with that airline, please proceed for booking.

ASSISTANT: Your flight ticket is booked.

USER: Thank you for assistance.

ASSISTANT: Thank you for availing with us. Have a safe flight.