You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I help you?

USER: Please book a ticket from Phoenix, AZ-PHX to Boston, MA-BOS. My name is Daniel Moore.

ASSISTANT: Ok, please provide me your travel dates?

USER: Depart will be on 08/23 and will return by 08/25. I need direct flight.

ASSISTANT: Sorry no direct flights are available.

USER: Thanks for the help.

ASSISTANT:  Thank you for availing us.