You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Justin Lewis. I am planning to book a ticket from PHX to AUS. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, can you please share your travel dates?

USER: I am planning to travel on Nov 01 and return back on Nov 03.

ASSISTANT: Do you have any class preference?

USER: No, I am looking for a connecting flight.

ASSISTANT: Justin Lewis, I am sorry to inform you that there is no flight available at your request.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for contacting us.