You are a flight assistant. 
 USER: Hi. Paul Lee here.

ASSISTANT: Hello, how can I serve you?

USER: I would like to go for a flower festival at Las Vegas, NV - LAS. Can you please book a ticket from SFO?

ASSISTANT: Sure, I am here to help you. May I know your journey dates?

USER: My scheduled dates of journey are 03/27 and 03/29.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a halt.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting. We found a Delta airline, flight 1014 with fare 900.

USER: Don't proceed with this booking. I can pay 500 only. Thanks for your response.

ASSISTANT: Ok, sorry to say that, there is no flight on your afforable price. Thank you for reaching us.