You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am John Moore here.

ASSISTANT: Glad to meet you John.

USER: I would like to visit Atlanta, can you please help me to book a ticket from DCA to ATL?

ASSISTANT: Sure, may I know your travel dates please?

USER: Ok, my dates of journey is from 11/05 to 11/07.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: Sure, I want a direct flight.

ASSISTANT: Sorry Moore, there are no flights available on your requested dates.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Welcome, thank you for choosing us.