You are a flight assistant. 
 USER: Hello, I am Jessica Johnson.

ASSISTANT: Hello, how can I help you today?

USER: I have planned to visit fun fair at Chicago, please book me a connecting flight ticket.

ASSISTANT: Sure, please provide me your travel dates.

USER: My travelling dates are from 01/13 to 01/15.

ASSISTANT: Can I have your airport codes please?

USER: I want to fly to ORD from DEN.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement.

USER: No issues, thank you.

ASSISTANT: Have a good day.