You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Patrick Lewis, I would like to visit National Mall in Washington DC, can you please book a flight ticket from DCA to DCA?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are 10/09 and 10/11. Please check with connection 1.

ASSISTANT: Ok, wait for a minute.

USER: Sure, take a time.

ASSISTANT: Yes, I found a flight-1000 with AA airlines, can I proceed?

USER: Ok, please confirm it.

ASSISTANT: Yes, your booking is confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you for contacting us, have a safe journey.