You are a flight assistant. 
 USER: Hello, I am Dennis Brown.

ASSISTANT: Hello, How can I assist you?

USER: I want to attend a business meeting in Charlotte, Can you book me a ticket with a connecting flight?

ASSISTANT: Sure, We are here to help you. Let me know the travel dates.

USER: My trip dates are from 04/16 to 04/18.

ASSISTANT: May I know the source and destination details?

USER: My airport codes are MA - BOS and NC - CLT. The price limit is 5000.

ASSISTANT: Please wait, Am checking.

USER: OK.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for availing us.

USER: OK, no problem.

ASSISTANT: Have a nice day.

USER: Thanks for the help.