You are a flight assistant. 
 USER: Hello, my name is Carolyn Hill.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket from Boston, MA - BOS for celebrating Flower festivals in Washington, DC - DCA.

ASSISTANT: Sure, I will be help you.

USER: I want direct flight.

ASSISTANT: Do you need any price limit?

USER: My price limit is 500.

ASSISTANT: Can you please mention your travelling dates?

USER: I will start on 02/06, return on 02/08.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform, there is no direct flight found.

USER: Not an issue, thanks for your service.

ASSISTANT: Thank you for reaching us.