You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be of your help?

USER: Ryan Lewis here. I have a tournament in  febway park at Boston, help me in booking my flight ticket with single stopover.

ASSISTANT: Sure, please share me your travel dates.

USER: I would like to start on 04/24. My return journey will be on 04/26.

ASSISTANT: Provide me your airport codes please.

USER: I would like to board from CO-DEN . My landing airport code is MA-BOS.

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

USER: No issues, thank you for your assistance.

ASSISTANT: Thank you.