You are a flight assistant. 
 USER: Hi, I am William Gonzalez.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a flight ticket to New York with price under 500, can you please help me with it?

ASSISTANT: Sure, may I know your airport codes.

USER: Airport codes are 02/15 and 02/17.

ASSISTANT: Kindly mention your airport codes.

USER: Airport codes are PHL-LGA.

ASSISTANT: Frontier airline with flight number 1016 and price of 100 available on your dates. Shall I proceed?

USER: You can proceed with booking.

ASSISTANT: Your booking has been processed.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.