You are a flight assistant. 
 USER: Hello, I am Kenneth King.

ASSISTANT: Hello,. How may I assist you?

USER: I have a conference at Cobo Centre in Chicago. Can you help me in booking a connected flight?

ASSISTANT: Please provide your travel dates?

USER: I want to travel on 12/10, and need to catch return flight on 12/12.

ASSISTANT: Please specify travelling airport codes?

USER: Source is from IAH and destination is to ORD.

ASSISTANT: No flight is available with your requirement.

USER: Ok, no problem.

ASSISTANT: Thanks.

USER: Thanks for the information.