You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you for today?

USER: I'm Carolyn Lopez. I am planning to attend business meeting at MCO, can you please help me with booking a flight ticket from CLT?

ASSISTANT: Sure, please let me know your travelling dates to search a flight?

USER: Sure, I would like to take off on 07/21 and return back on 07/23.

ASSISTANT: Please wait for a moment to check the availability.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: Sorry, there is no flight with your requested price.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us, have a nice day.