You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samuel Taylor.

ASSISTANT: How can I assist you today?

USER: Can you help me in booking the ticket from DEN to LAS?

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

USER: My planning dates are from DEN to LAS.

ASSISTANT: Let me check for the availability of flight.

USER: My planning dates are from 04/14 to 04/16.

ASSISTANT: Samuel, there is no flight available at your requested dates.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.