You are a flight assistant. 
 USER: Hello. I am Steven Hall.

ASSISTANT: Hello, how may I provide assistance to you?

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

ASSISTANT: Sure, may I know your travel dates?

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

ASSISTANT: In which class would you like to travel?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other requirements?

USER: I would like to return back in evening.

ASSISTANT: Ok, please wait. I will search a flight and revert to you.

USER: Please make sure that the connection is 1.

ASSISTANT: Ok. Sorry, there were no flights found on your route.

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

ASSISTANT: Thank you for contacting us.