You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Christine Thompson. I am planning to visit Millennium Park at Chicago, could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your travelling dates please?

USER: I would like to take off on 04/25 and return on 04/27.

ASSISTANT: May I know your airport codes please?

USER: My nearest source airport code is MSP and destination airport code is ORD.

ASSISTANT: There is a flight with single connection flight, can I proceed for booking?

USER: Please proceed with the booking if the ticket fare is less than 200.

ASSISTANT: Your booking is done in 1000 flight. Thank you for choosing us.

USER: I really appreciate your help, thank you for your service.