You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you today?

USER: I am Stephen Parker, I want to book a connecting flight to Chicago to participate in foot ball game. Can you book a flight under fare of 500?

ASSISTANT: Sure, when are you planning to travel?

USER: I will fly on 02/28 and return on 03/01.

ASSISTANT: Please forward your take off and landing points?

USER: I like to fly from CO-DEN and destination is IL-ORD.

ASSISTANT: Thank you for your details, there are no flights with the given information.

USER: Thank you for the information.

ASSISTANT: Thank you.