You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anthony Collins here.

ASSISTANT: How can I aid you at this moment?

USER: Can you please help me in booking a flight ticket from CLT to LAS?

ASSISTANT: Sure, I am here to help you. Could you please provide your journey dates?

USER: Sure, my travel dates are from May 17 to May 19.

ASSISTANT: Do you have any connection preference?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your specific depart and arrival timings for this trip?

USER: I would like return in the afternoon.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any airline preference for this trip?

USER: No.

ASSISTANT: Anthony Collins, there are no flight services are available on this route with your preferences.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.