You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I make you happy today?

USER: I need a ticket to Washington DC-DCA from New York, NY-JFK, for sports event.

ASSISTANT: Please help me with your journey dates.

USER: Sure. I will depart on 02/27 and intend to return by 02/29.

ASSISTANT: Can I get your name?

USER: My name is Mark Baker.

ASSISTANT: Thank you, Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Thanks for the help.

ASSISTANT: Thank you, Have a great day.

USER: Thanks.