You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: I am Jeffrey Lee, I want to book a flight ticket to visit twin peaks. Please help me out.

ASSISTANT: Sure. Help me with the journey dates.

USER: My travelling dates are from 07/04 to 07/06.

ASSISTANT: Do you have any specifications?

USER: I need the ticket within price 500.

ASSISTANT: May I know your airport codes?

USER: I want to fly from NC- CLT to CA- SFO.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: There is a flight in airline Southwest and number is 1006. Can I book it?

USER: Please go with booking.

ASSISTANT: Your ticket is reserved, happy journey.

USER: Thank you for your service.

ASSISTANT: Thank you for picking us.