You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Raymond Phillips here, can you please help me in booking the ticket from DCA to AUS? As I'm planning to visit Austin.

ASSISTANT: Sure, I will help you with this. Can you please provide your journey dates to proceed further?

USER: Sure, my planned departure and return travel dates are 10/20 and 10/22.

ASSISTANT: Wait a moment please.

USER: Sure, please check for direct flights.

ASSISTANT: Raymond Phillips, there is no direct flight service available on this route on your provided dates.

USER: Oh! That's ok, I'll reach my destination by some other mode of transport. Thank you anyways.

ASSISTANT: Thank you for contacting us.