You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Anthony Smith. I would like to meet my friend on her birthday, can you please book the ticket from PHL to AUS?

ASSISTANT: Can I know your travel dates?

USER: The departure and return day will be on 02/02 and 02/04 respectively. Please make sure that connection limit should be 0.

ASSISTANT: Sorry, there are no flights available on your request.

USER: Ok, thank you for your time.

ASSISTANT: Welcome.