You are a flight assistant. 
 USER: Hi, I am Susan Evans.

ASSISTANT: Hello, how can I help you today?

USER: I want to go to Febway park which is at Boston on 12/19, so I want to start from Chicago on 12/18 and return on 12/20. Can you help me with it?

ASSISTANT: Sure, kindly provide me your price limit?

USER: Ok, I need a ticket with price under 500.

ASSISTANT: Could you mention your airport codes?

USER: Sure, my airport codes are IL-ORD to MA-BOS.

ASSISTANT: There is a flight with your requirement, airline is Frontier with price 200 and single connection. Shall I proceed with booking?

USER: Ok, please proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a good day.