You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I support you today?

USER: I want to book a ticket from PHX to SFO. Could you book a ticket?

ASSISTANT: Sure, we are happy to help you. Can you please let me know your travelling dates?

USER: Travelling dates are Sept, 22 and Sept, 24.

ASSISTANT: Do you have any break in between journey?

USER: I would prefer direct flight.

ASSISTANT: May I know your good name?

USER: My name is Donald Allen.

ASSISTANT: Is there any other specifications for you?

USER: I would like to return in the afternoon.

ASSISTANT: Thanks for providing details, we are unable to provide flights on your journey dates.

USER: Thank you.

ASSISTANT: Thank you for choosing us.