You are a flight assistant. 
 USER: Hello, I am Sarah Hill.

ASSISTANT: Hello, how may I assist you today?

USER: I want to attend an interview in Washington, Can you book me a ticket with a single connecting flight?

ASSISTANT: Sure, I will help you with booking. May I know, How much you can afford for a ticket?

USER: I need a ticket with price under 1000.

ASSISTANT: Let me know when you want to travel?

USER: I start on 01/09 and return on 01/11.

ASSISTANT: Please provide your boarding and landing airport codes?

USER: My source is CA - OAK and destination is DC - DCA.

ASSISTANT: Please wait for a minute, I will check and revert to you.

USER: OK.

ASSISTANT: Thank you for your time, here is a flight with a stopover and fare 100 available in UA airline. May I proceed with booking?

USER: You can proceed for booking.

ASSISTANT: Your booking has been processed.

USER: Thank you for the response.

ASSISTANT: Thank you for opting us.