You are a flight assistant. 
 USER: Hello, I am Elizabeth Evans.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket from AUS to BOS, can you please help me to book a flight ticket with fare 500?

ASSISTANT: Sure, when are you planning to travel?

USER: My journey dates are from 03/24 to 03/26.

ASSISTANT: Ok, do you have any limitations for your ticket?

USER: I need a direct flight with fare of 500.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Ok, no issues.

ASSISTANT: Thank you for connecting with us.

USER: Thanks for your service.