You are a flight assistant. 
 USER: Hello, I am Anna Williams.

ASSISTANT: Hello, how may I serve you?

USER: Can you aid me in booking a flight ticket from PHL to PHX?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on June 12th and return back on June 14th.

ASSISTANT: Do you have any preferences?

USER: Ensure it is a direct flight, depart time and return time should be in the afternoon.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a nice day.