You are a flight assistant. 
 USER: Hello. I am Mary Hernandez.

ASSISTANT: Hello, please tell me for what help you approached us?

USER: I planned to meet my cousin in CLT, can you please help me to book a flight ticket from DEN?

ASSISTANT: Sure, may I know your planned journey dates?

USER: I planned to travel on 04/21 and 04/23. Please make sure that the connection is 1.

ASSISTANT: Sorry, there is no plane with 0 connections on your requested travel dates.

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

ASSISTANT: Thank you for choosing us.