You are a flight assistant. 
 USER: Hello. I am Mark Jones.

ASSISTANT: Hello, how may I aid you?

USER: I would like to book a ticket from IAD to DEN, can you please help me out?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I would like to travel on these dates 01/20 and 01/22.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

ASSISTANT: Ok, there is a flight 1021 in UA airline matching your details with price 200. Shall I proceed?

USER: Make sure my connection limit is 0.

ASSISTANT: Sorry to say, no direct flights were found on your route.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us, have a nice day.