You are a flight assistant. 
 USER: Hi. I am Kathleen Young.

ASSISTANT: Hello. How can I aid you today?

USER: I want to attend a Pagan festival with my sister at Denver, can you please book me a flight ticket?

ASSISTANT: Sure, I am here to help you, may I know your travelling dates?

USER: My travelling dates are from 08/17 to 08/19.

ASSISTANT: Could you please help me with your airport codes?

USER: My airport codes are from SFO-DEN.

ASSISTANT: Please mention your price limit.

USER: My price limit is 200.

ASSISTANT: There is a Spirit 1006 airline which matches your travelling dates. Price is of 600. Shall I proceed with booking?

USER: Please proceed for booking.

ASSISTANT: You said that the price should be below 200.

USER: Do not proceed.

ASSISTANT: Sure, thank you for choosing us.

USER: Thank you.