You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I would like to meet my client at New York, could you please help me to book my flight ticket from DCA to JFK?

ASSISTANT: Sure, can I know your travelling dates?

USER: Thank you. I will depart in the evening on Jan 3rd and return back on Jan 5th.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Brian Smith.

ASSISTANT: Do you have any connection limit?

USER: Yes, I prefer for a single connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: Not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.