You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Please help me to book a flight ticket from IAD to MCO.

ASSISTANT: Can I know your travelling dates please?

USER: My trip is in Nov from 19th to 21st.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other preference?

USER: I prefer to return in afternoon.

ASSISTANT: Can I know your name please?

USER: Jacob Smith here.

ASSISTANT: Sorry, no flights available on your route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.