You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I planned to meet my friend in DFW, can you please help me to book a flight ticket from JFK?

ASSISTANT: May I know your travelling dates?

USER: I prefer to travel on Oct 19 and Oct 21.

ASSISTANT: Please let me know your connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: No flights available on your route.

USER: Ok, no problem.

ASSISTANT: May I know your name?

USER: I am Jennifer Williams.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.