You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Pamela Turner want to attend a business conference at DFW, can you help me to book a direct flight?

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

USER: Yes, my travelling dates will be 03/06 and 03/08.

ASSISTANT: Could you please provide the source airport code?

USER: Sure, I want to depart from DEN.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Ok.

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

USER: That's ok, thank you.

ASSISTANT: You are welcome. Thank you for reaching us.