You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your service today?

USER: Could you please book a flight ticket from LGA to ATL?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are Oct 18 and Oct 20.

ASSISTANT: Do you have any other specifications?

USER: I need a single connecting flight.

ASSISTANT: Please help me with your name for booking.

USER: My name is Betty Lopez.

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

USER: Not a problem, thank you.

ASSISTANT: Thank you for choosing us.