You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Thomas Clark. Can you help me in booking the ticket from CLT to DEN?

ASSISTANT: Sure, can you please share your travel dates?

USER: My planning dates are from 02/06 to 02/08.

ASSISTANT: Let me check for the availability of flight.

USER: Ok.

ASSISTANT: Thomas, I am sorry to inform you that there is no flight available at your requested dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.