You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I best assist you now?

USER: Can you please help me in booking my flight ticket from JFK to IAD?

ASSISTANT: May I know on what dates would you like to travel?

USER: My planned travel dates are Feb 17-19.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I prefer to fly in connected flight.

ASSISTANT: May I know your name?

USER: Myself, Kevin Lee.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Any other specifications do you have?

USER: No.

ASSISTANT: Sorry Kevin Lee, based on your desired specifications we haven't found any flight in airline database.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thanks for contacting us.