You are a flight assistant. 
 USER: Hi, I am Donald Harris.

ASSISTANT: Hello, how may I serve you?

USER: I want to visit Rosedale a historic plantation house located at Charlotte, can you please book me a ticket for direct flight?

ASSISTANT: Sure, Can you please let me know your schedule dates?

USER: My scheduled dates are from 05/19 to 05/21.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from Houston, TX-IAH to Charlotte, NC-CLT.

ASSISTANT: Is there any price limit for you?

USER: My price limit is 500.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Unfortunately, there is no direct flight found on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thanks for approaching us, have a great day.

USER: Thank you.