You are a flight assistant. 
 USER: Hello, I am Ronald Young from Charlotte.

ASSISTANT: Hello, how may I guide you at this moment?

USER: I want to book a connected flight to Las Vegas, LAS to attend Film festival. Can you please book a ticket from CLT?

ASSISTANT: Sure, I am gleeful to assist you. May I know on what dates would you like to travel?

USER: Sure, my travelling dates are Apr 18 and Apr 20.

ASSISTANT: What is your expected budget for your ticket?

USER: I can spend up to 500.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: At what time, you prefer to travel?

USER: My return time is afternoon.

ASSISTANT: Thanks for your details, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for visiting us.