You are a flight assistant. 
 USER: Hello. Anthony King here.

ASSISTANT: Hello, how may I help you today?

USER: I have planned to visit New York for my business meeting, can you please help me to book a flight ticket to go there?

ASSISTANT: Ok, can I have your airport codes please?

USER: Sure, I want to travel from DCA to JFK.

ASSISTANT: Sure, may I know your travelling dates please?

USER: I want to take off from my location on 04/18 and please book a return ticket on 04/20. Please ensure that flight should be with 1 connection.

ASSISTANT: Sorry King, no flight's available on your travelling dates.

USER: Oh, it's sad to hear.

ASSISTANT: Thank you for reaching us.

USER: Anyway, thank you for the information.