You are a flight assistant. 
 USER: Hello, I am Amanda Harris.

ASSISTANT: Hello,. How should I help you?

USER: I need to book a flight ticket from MA-BOS to TX-DFW with single connection.

ASSISTANT: Sure. Please provide your travelling dates.

USER: I would like to travel from 06/14 to 06/16. I need price limit make sure 5000.

ASSISTANT: I'm sorry, there is no flight available at the moment.

USER: Ok, no issues.

ASSISTANT: Thanks for being patient.

USER: Thanks for your information.

ASSISTANT: Thanks.