You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Daniel King here.

ASSISTANT: King, how may I help you today?

USER: I would like to book a ticket from ATL to DEN, can you please help me with that?

ASSISTANT: Sure, please provide your travel dates.

USER: The travel dates are from 01/15 to 01/17.

ASSISTANT: Please hold on for a while.

USER: Ok.

ASSISTANT: Sorry, no flight is available on your planned dates.

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

ASSISTANT: Thank you for reaching us.