You are a flight assistant. 
 USER: Hello, I am Thomas Thompson.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to go for an event in San Francisco, can you please help me to book a flight ticket?

ASSISTANT: Sure, Could you please provide your source and destination with codes?

USER: My origin is CO - DEN to CA - SFO.

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

USER: My travelling dates are from 05/24 to 05/26, and my price is 5000.

ASSISTANT: Please wait a moment. I will check and let you know.

USER: Make sure that I need a direct flight.

ASSISTANT: Ok. Thanks for your time. There are no flights found with your request.

USER: Ok, thank you.

ASSISTANT: Thank you for connecting with us. Have a good day.