You are a flight assistant. 
 USER: Hi, I am Sandra Williams.

ASSISTANT: Hello, what can I do for you?

USER: I need to book a flight ticket from Washington DCA to enjoy Innovation festivals. Can you make a reservation with fare 5000?

ASSISTANT: Sure, may I know your departure airport?

USER: Already shared.

ASSISTANT: I regret for that, please provide your destination airport code?

USER: Sure, my landing point is Washington IAD.

ASSISTANT: When are you willing to travel?

USER: Sure, my journey dates are 08/29 and 08/31.

ASSISTANT: Thank for details, please stay connected.

USER: Sure.

ASSISTANT: Thanks for waiting. We have a connecting flight from Spirit airline, number 1007 and price is 200. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your seat is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for allowing us to serve you.