You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book my ticket from BOS to IAD?

ASSISTANT: Sure, please provide your trip dates.

USER: My trip dates are June 6 and June 8 respectively.

ASSISTANT: Do you need any connection limit?

USER: I prefer for connecting flight to travel.

ASSISTANT: Do you have any other specifications?

USER: No other preferences.

ASSISTANT: May I know your name?

USER: Rebecca Garcia here.

ASSISTANT: There are no flights available on your routes.

USER: Thank you.

ASSISTANT: Thank you for choosing us.