You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I need to book a flight ticket from DFW to LGA, Can you please help me for booking?

ASSISTANT: Can I know your travelling dates?

USER: I would like to travel on 12/17 to return on 12/19.

ASSISTANT: Please let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: James Anderson.

ASSISTANT: Sorry, no flights available on your route.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.