You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: Can you book a ticket from DEN to DFW? As I need to attend a workshop.

ASSISTANT: Sure, please share me your planned journey dates?

USER: Sure, my planned departure and return travel dates are 23rd and 25th of March.

ASSISTANT: Please mention your connection limit?

USER: I'm looking for single connected flight.

ASSISTANT: May I know your good name?

USER: Yes, my name is Kathleen Collins.

ASSISTANT: Do you have any other requirement?

USER: I want to depart in the afternoon time.

ASSISTANT: Thank you for the details, sorry there is no flight found on your given journey data.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for visiting us, we hope see you again.