You are a flight assistant. 
 USER: Hi, I am Patrick Nelson.

ASSISTANT: Hello, how can I aid you today?

USER: Could you please help me to book an economy class ticket within the fare limit 500 to New York?

ASSISTANT: Sure, we are here to help you. Kindly provide me your travel dates.

USER: Thank you. I intend to start on 12/30 and my return date would be on 01/01.

ASSISTANT: May I know your New York airport code?

USER: My destination airport code is New York, NY-LGA.

ASSISTANT: Could you please mention me your take off airport code?

USER: My source point is Houston, TX-HOU.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with flight your requirement, airline is UA with price 100 and single connection.

USER: That's fine, you can proceed with the booking.

ASSISTANT: Your booking is done and flight number is 1001.

USER: Thank you for your assistance in booking.

ASSISTANT: Thanks for reaching us.