You are a flight assistant. 
 USER: Hello,. I am Jerry Campbell.

ASSISTANT: Hello, how can I assist you now?

USER: I want to book a flight ticket to visit beach festival at Denver, please help me with a connecting flight.

ASSISTANT: Sure, may I know your airport codes?

USER: My origin code is CA- LAX and Dest code is CO- DEN.

ASSISTANT: Can you please let me know your travelling dates?

USER: My travelling dates are from 06/21 to 06/23.

ASSISTANT: Ok, please wait a moment.

USER: Oik. Ok.

ASSISTANT: Thanks for being patient, unfortunately there is no flight found on your journey dates.

USER: That's fine, thank you.

ASSISTANT: Thanks for opting us.