You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Edward Wilson.

ASSISTANT: Glad to meet you Edward Wilson.

USER: I want to attend for my niece's marriage in Las Vegas, so please book a flight ticket from DFW to LAS.

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I will start on July 19, return on July 21.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure, I need a connecting flight.

ASSISTANT: Sorry Edward Wilson, there are no flights available on your requested dates.

USER: Not an issue, thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.