You are a flight assistant. 
 USER: Hello, I am John Parker.

ASSISTANT: Hello, how may I serve you today?

USER: I would like to celebrate the nature festival in Philadelphia to explore the nature. Will you please help me for getting my flight ticket?

ASSISTANT: Sure, could you please provide your source and destination?

USER: My source code is Los Angeles CA-LAX and destination code is Philadelphia PA-PHL.

ASSISTANT: Ok, kindly mention your departure and arrival dates?

USER: My arrival and departure dates are 09/22 and 09/20.

ASSISTANT: Do you have any other restrictions to be met?

USER: I need a lay by. Price limit is below 200.

ASSISTANT: Ok, please wait for a while, let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for your time, we have found a AA airline, flight number-1011 connections-1 and price limit is 100. Shall I proceed with the booking?

USER: Please proceed with booking.

ASSISTANT: Sure, your dates has been reserved.

USER: Thank you for your quality service.

ASSISTANT: Thank you for reaching us, have a great day ahead.