You are a flight assistant. 
 USER: Hi. I am Frank Roberts.

ASSISTANT: Hello, how can I help you?

USER: I want to give a seminar about arts at Minneapolis institute of Arts. So I want a flight with price limit 500, can you book a flight for me?

ASSISTANT: Sure, can you please provide your journey details?

USER: My preferable dates are from 07/06 to 07/08. My airport codes are from LGA to MSP.

ASSISTANT: Thank you for providing your details. Sorry we found a flight with price 800 .

USER: Don't proceed booking.

ASSISTANT: Ok.

USER: Thank you for quick response.

ASSISTANT: Thank you for reaching us, have a great day.