You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking to book a flight ticket from BOS to SEA. Can you help me for that?

ASSISTANT: Sure, can I know your name?

USER: My name is Jack Scott.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are July 12 and July 14.

ASSISTANT: Do you prefer a connecting flight or direct flight?

USER: I prefer to book a single connecting flight.

ASSISTANT: May I know your other specifications?

USER: No. I don't have any specifications to mention.

ASSISTANT: Sorry, there are no flights available on your request.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.