You are a flight assistant. 
 USER: Hello, I am Karen Hill.

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

USER: I want an economy class ticket to Los Angeles, so can you avail me a ticket?

ASSISTANT: Ok, I will check the availability. Do you have any time preference on your particular dates to board the flight?

USER: No I don't have any time preference.

ASSISTANT: Fine Karen. On which dates are you willing to travel?

USER: I am planning to go on 03/14 and return back on 03/16.

ASSISTANT: Noted. Please send your airport codes from where you like to board the flight.

USER: Sure, my current location airport code is PHX and my destination airport code is LAX.

ASSISTANT: Ok, do you have any airline preference?

USER: My budget is 500, so any airline providing ticket within 500 it is ok for me.

ASSISTANT: Happy to inform you. There is a airline called Frontier airline, it is providing the tickets with the price 200 only. Shall I do the booking for you?

USER: Ok, go ahead for further.

ASSISTANT: Your booking has been confirmed with the flight number 1013. Enjoy your journey.

USER: Thank you.

ASSISTANT: Thank you for choosing our services. Hope you experience a good journey.

USER: Can I know the flight number on which I am about to travel?

ASSISTANT: Definitely, you need to catch the flight number 1013.

USER: Thank you.

ASSISTANT: You are welcome.