You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, welcome to flight booking agency. How can I assist you today?

USER: I want to book a flight ticket to Charlotte with price under 1000. Can you help me with it?

ASSISTANT: Sure, can you please share your preferable travel dates?

USER: My travel dates are 01/26 and 01/28.

ASSISTANT: Could you please provide the airport codes?

USER: Airport codes are BOS-CLT.

ASSISTANT: May I know your name to proceed further?

USER: My name is Justin Miller.

ASSISTANT: Thank you for providing the details. Let me check for the availability of flight on this route.

USER: Ok.

ASSISTANT: Justin, I am sorry to inform you that there is no flight available at your requested dates.

USER: Ok, no issues.

ASSISTANT: Thank you for contacting us.

USER: Thanks for the help.

ASSISTANT: You are welcome.