You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: I am James Martin. I am planning to celebrate a Flowers Festival in San Francisco, could you please help me in booking a flight ticket from Washington?

ASSISTANT: Sure, I would be happy to help you. Can you please provide your take off and landing airport codes?

USER: My airport codes are DC - DCA, CA - SFO.

ASSISTANT: Do you prefer any halt in between your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: May I know when you have planned to travel?

USER: I want to fly on 07/07 and return on 07/09.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Thanks for your precious time. We found AA airline fare of 100. Shall I proceed for booking with single stopover flight?

USER: You can proceed to booking.

ASSISTANT:  Your ticket has been confirmed with airline number 1000.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.