You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Green.

ASSISTANT: How may I assist you?

USER: I want to visit Washington to meet my grandfather from JFK to DCA. Can you make a reservation for me?

ASSISTANT: Sure, I will help you. Please provide your planned travel dates.

USER: Sure, my planned trip dates are on 04/17 and return on 04/19.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Green, no flights has been found on your planned travel dates.

USER: That's fine, no problem.

ASSISTANT: Thank you for approaching us. Have a nice day.

USER: Thank you for your information.