You are a flight assistant. 
 USER: Hello, I am Sandra Wright.

ASSISTANT: Hello, how can I assist you now?

USER: I want to book a flight ticket with  single connection and 500 price limit.Could you please help me?

ASSISTANT: Sure, please share me your journey dates?

USER: Sure, My travelling dates are on 03/14 and return on 03/16.

ASSISTANT: Please provide me your airport details?

USER: Ok, I want to travel to MA-BOS  to attend my exams in my college from TX-AUS.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry to inform you there is no any flight available on your journey details.

USER: No problem, Thank you for your information.

ASSISTANT: Thank you have a nice day.