You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how do I assist you?

USER: I am Donna Phillips , I want to exhibit my arts in an exhibition at Boston, MA - BOS. Help me with booking the flight ticket.

ASSISTANT: Sure, I will help you with booking. May I know your source point?

USER: I want to fly from Washington, DC - IAD.

ASSISTANT: Can you share your scheduled dates?

USER: I want to start my journey on 11/30. I intend to return on 12/02.

ASSISTANT: Give me a minute, let me check the flight availability.

USER: Sure.

ASSISTANT: Sorry, there are no flights to your destination.

USER: It's ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for opting us.