You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to book a flight ticket from LAS to PHX for attending a event.

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: Thank you for accepting my request.

ASSISTANT: You are welcome..

USER: My travelling dates are Nov 13 and Nov 15.

ASSISTANT: Please help me with your name.

USER: I am Melissa Miller.

ASSISTANT: Do you need a break in between your journey?

USER: Yes, I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: I want to return in the afternoon.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Melissa Miller, I am really sorry to inform you that there are no flights available for your journey.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great time.