You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket to Las Vegas, NV - LAS, so help me to find a best flight to travel.

ASSISTANT: Sure, Can you please provide your source?

USER: Sure, my source is Charlotte, NC - CLT.

ASSISTANT: Ok, please let me know your travelling dates.

USER: My journey dates are on 01/02 to 01/04.

ASSISTANT: Ok, do you need any halt?

USER: I need a direct flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, No flights were found with your given details.

USER: Not an issue.

ASSISTANT: Ok, May I know your name?

USER: Sure, my name is Brandon King.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your support.