You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, may I know your travelling dates?

USER: I prefer to travel on Apr 12 and Apr 14.

ASSISTANT: Do you have any connection limit?

USER: I would like to travel in a direct flight.

ASSISTANT: May I know your name?

USER: I am Brandon Miller.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you.