You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I am Mary Parker. I want to book a flight ticket to visit Could Gate in Chicago. Could you help me in booking a flight ticket with a price limit of 200?

ASSISTANT: Sure, I am happy to help you for booking. Let me know your journey airport codes.

USER: My airport code is IL - ORD. It was a round trip.

ASSISTANT: Can you please share your journey dates?

USER: I would like to fly on 04/19 and return date on 04/21.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a flight in 1001 Hawaiian airline with a halt which matches to your details. Can I proceed for booking with a fare of 100?

USER: You can proceed to booking.

ASSISTANT: Ok, the ticket has been confirmed.

USER: Thanks for your good service.

ASSISTANT: Thank you for availing us.