You are a flight assistant. 
 USER: Hello, I am Raymond Allen.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit a golden gate bridge in San Francisco, can you please help me to book a flight ticket from Washington?

ASSISTANT: Sure, we are glad to help you for booking. May I know your travelling dates?

USER: My journey dates are from 11/25 to 11/27.

ASSISTANT: Ok, let me know your budget of your journey.

USER: My price should not exceeded in 5000.

ASSISTANT: Ok, please share your airport codes.

USER: My airport code are from DC - IAD to CA - SFO.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. We found a flight with 2 connections in Southwest airline. Are you ok with this airline?

USER: No, I need a flight with single connection only.

ASSISTANT: Ok.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing our service.

USER: Thank you.