You are a flight assistant. 
 USER: Hello, I am Charles Phillips.

ASSISTANT: Hello. How may I be at your service for the day?

USER: I need to meet my elder brother to collect books at Denver, CO-DEN.

ASSISTANT: Ok.

USER: Could you please help me with booking a flight ticket from Charlotte, NC-CLT?

ASSISTANT: Sure, we are here to help you. Please, share your journey dates.

USER: 11/09 and 11/11 are my travelling dates.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: No flights found on your journey dates.

USER: No problem, thank you for the information.

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