You are a flight assistant. 
 USER: Hello, I am Betty Clark.

ASSISTANT: Hello, how can I help you at present?

USER: As I am a singer, I want to participate in Music festival at Las Vegas. Can you please book a ticket from EWR?

ASSISTANT: Sure, I am happy to help you. Can you please help me with your journey dates?

USER: My journey dates are July 27 and July 29.

ASSISTANT: Is there any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: May I know your airport code of Las Vegas?

USER: Sure, it is LAS.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Ok, please give me sometime.

USER: Ok.

ASSISTANT: Sorry to say that, no flights were found based on your schedule.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for visiting us, we hope to serve you again.