You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a flight ticket from BOS to PHX?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are Feb 13 and Feb 15.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Is there any thing else?

USER:   I need a business class ticket.

ASSISTANT: May I know your name please?

USER: My name is Paul Robinson..

ASSISTANT: I am sorry no flights found on your route.

USER:     That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.