You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I need to book a ticket from PHX to ORD. Could you book a ticket?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Travel dates are Aug, 20 and Aug, 22.

ASSISTANT: Do you have any connection limit preference?

USER: I prefer direct flight.

ASSISTANT: Do you have any other specifications for this trip?

USER: I would like to depart in the afternoon.

ASSISTANT: May I know your good name please?

USER: My name is Richard Collins.

ASSISTANT: Richard Collins, there are no flight services are available on this route on your provided dates.

USER: Thank you.

ASSISTANT: Thank you for contacting us.