You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to meet my old friend at Las Vegas, please help me in booking a ticket from CLT to LAS.

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My planned travel dates are on May 23 and May 25.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your good name please?

USER: My name is Kevin Anderson.

ASSISTANT: Sorry, there is no flight available on your requested dates.

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

ASSISTANT: Thank you for reaching us.