You are a flight assistant. 
 USER: Hello, I am Christine Wilson.

ASSISTANT:  Hello, what services are you seeking from us?

USER: I going to participate in a swimming competition in Chicago open water swim, please book a flight ticket under price 200.

ASSISTANT: Sure, we would be happy to help you.

USER: Thank you.

ASSISTANT: Can you please help me with the selected airport code of Chicago?

USER: Sure, destination airport Chicago, ORD.

ASSISTANT: From which airport you would like to board the flight?

USER: My boarding point would be New York, LGA.

ASSISTANT: Ok, on which dates you need to go Chicago and come back to New York?

USER: My travelling dates are depart date on 02/22 and return date on 02/24.

ASSISTANT: Please hold on for a moment, I will check the availability of flights on your route and get back to you.

USER: Sure, take your time.

ASSISTANT: Thank you for your time, we are glad to inform you that Hawaiian airline is available for you at a fare of 100 with a halt. Would you like me to proceed with the booking?

USER: Please proceed with booking.

ASSISTANT: Sure, our booking has been confirmed in flight number 1000 in economy class.

USER: Thanks for your service.

ASSISTANT: Thank you for making us to serve you, have a safe journey.