You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need you to book a flight ticket from AUS to PHX. Please help me.

ASSISTANT: Sure, I can help you wit that. May I know your travel dates please?

USER: April 16 and 18 are my planned travelling dates.

ASSISTANT: How many stop overs are you expecting in between your journey?

USER: Just one is sufficient for me.

ASSISTANT: Please let me know if you have any other specifications.

USER: I wish to depart in the afternoon.

ASSISTANT: Can I have your good name please?

USER: John Johnson here.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates which will depart in the afternoon time.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.