You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket from LAS to SFO. Could you help me in booking?

ASSISTANT: Sure, I will help you with booking. Please share me your planned journey dates?

USER: My travelling dates are from Nov 05 - 07.

ASSISTANT: Do you want a connecting flight?

USER: I prefer for direct flight.

ASSISTANT: Please mention your class preference?

USER: No.

ASSISTANT: Is there any other requirement?

USER: My return should be in the afternoon.

ASSISTANT: May I know your good name?

USER: Barbara Roberts.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.