You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I am Susan Martinez. I want to book a flight ticket to attend a meeting in Northeastern Political Science Association in Las Vegas. Can you help me in booking on 09/27 to 09/29?

ASSISTANT: Ok, may I know your journey points?

USER: MY journey points is IAD - LAS. I need a connected flight. Price limit should be under 5000.

ASSISTANT: Sorry for the inconvenience, we do not have fights on your requested dates.

USER: Ok, no issue. Thank you for your service.

ASSISTANT: Thank you for choosing our service.