You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please book me a ticket from BOS to DCA?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are from Dec 28th to Dec 30th.

ASSISTANT: Do you have any specifications?

USER: I want a business to travel. I prefer a connecting flight.

ASSISTANT: May I know your name?

USER: I am Anna Adams.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thank you.

ASSISTANT: Thank you.