You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Could you please book a flight ticket from BOS to HOU?

ASSISTANT: Your travelling dates please?

USER: My journey dates are July 21 and July 23.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Is there any specifications?

USER: I want to depart in the afternoon.

ASSISTANT: May I know your name please?

USER: My name is Laura Taylor.

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

USER: Not a problem, thank you for the information.