You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Rebecca Hernandez here.

ASSISTANT: Rebecca, what help you need from our side?

USER: Actually, I am looking for a flight with connection 0, so could you please help me with a booking of direct flight?

ASSISTANT: Sure, can I know your take off and landing airport codes please?

USER: I want to travel from BOS to IAD, for a business trip.

ASSISTANT: May I know your dates of travel please?

USER: I am heading from my location on 02/23 and after completion of my trip, please book a return flight on 02/25.

ASSISTANT: Sure, please hold a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there are no direct flights on your route.

USER: Oh, it's sad to hear. Anyways, thank you for the information.

ASSISTANT: You are welcome.