You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I got an invitation to attend president inauguration day in Washington DC - IAD. So I would like to book a flight ticket on that day that means on Jan 20th. Please book a ticket for me.

ASSISTANT: Sure, I can do that for you. May I know your Origin and return date?

USER: Sure, my origin point is Philadelphia, PA - PHL and my return date would be 01/22. Please make the booking with the name Mark Jones.

ASSISTANT: Ok, let me check what flights are available for you.

USER: OK.

ASSISTANT: Thanks for your patience. We found a UA airline with flight number 1001 and price of 200 matching your particulars.

USER: Is it a direct flight?

ASSISTANT: No it has one connection.

USER: OK, thanks for the information. I want to go with direct flight only.

ASSISTANT: Ok. We found an other flight with 0 connection. Airline : UA, flight number : 1017 and price 200.

USER: Please book this flight.

ASSISTANT: Ok. Your booking has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thanks for choosing us.