You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Margaret Jackson. I want to travel from MN-MSP to TX-AUS for an Comic show, Can you help me in booking a ticket?

ASSISTANT: Yes, I am here to help you. To proceed further, please provide your journey dates.

USER: My journey dates are from 12/17 to 12/19. With price limit 500.

ASSISTANT: Sorry, there is no flight available on that date. Thanks for connecting us.

USER: Thank you.