You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Davis.

ASSISTANT: How may I help you?

USER: I want to attend Religious festivals at San Francisco. could you please help me in booking a ticket with fare of 500?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are 03/23 and return on 03/25.

ASSISTANT: Please help me with your airport codes.

USER: My airport codes are LAS and SFO.

ASSISTANT: According to your information, I have found a direct flight in your journey with a minimum fare of 100 with flight number 1000. Shall I proceed with this flight?

USER: Fine, you can proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you.