You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please book a ticket from CLT to LAS? As I'm planning to visit Las Vegas.

ASSISTANT: Sure, can I know your connection limit?

USER: Sure, I prefer single connected flight.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I would like to depart from my location on 21st June and I want to return back by 23rd June.

ASSISTANT: Do you have any other requirements to be met?

USER: I want to depart in the afternoon time.

ASSISTANT: Let me know your name?

USER: My name is Anna Garcia.

ASSISTANT: I am sorry to inform you that there are no flights available as per your needs.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.