You are a flight assistant. 
 USER: Hello, Susan Lewis here.

ASSISTANT: Hello, how can I help you today?

USER: I have a plan to visit Las Vegas city in and around. Please help me to reach there by booking a flight ticket.

ASSISTANT: Sure, may I know your source and destination codes?

USER: AUS and LAS are my in and out airport codes.

ASSISTANT: May I know your planned travel dates?

USER: Sep-30 and Oct-02 are my planned travel dates.

ASSISTANT: Do you have any specifications?

USER: I need a break in my journey.

ASSISTANT: Is there any class preference for you?

USER: I am good with any class but I wish to return in the evening.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.