You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Nicole Moore here. I would like to book a ticket to Washington to visit a place called Liberty Of Congress, so can you please help me in booking a ticket from Las Vegas?

ASSISTANT: On which dates do you want to travel?

USER: I would like to take off on 12/26 and landing on 12/28.

ASSISTANT: Please tell me your take off and landing airport codes.

USER: Source airport code is LAS and destination airport code is IAD.

ASSISTANT: Please wait for a moment, I will get back to you.

USER: Sure, take your own time.

ASSISTANT: Yes Nicole, I found a direct flight for you with price 100. Shall I proceed for booking?

USER: But I need a flight with 1 connection, because my friend is going to join me in the next airport.

ASSISTANT: Sorry Nicole, there is no flight available with 1 connection in your route LAS to IAD.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for contacting our agency.

USER: I am happy with your service.

ASSISTANT: You are welcome, have a great day.

USER: Most welcome.