You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Karen Anderson here.

ASSISTANT: How may I assist you today?

USER: Please help me out in booking the ticket from PHX to LAX.

ASSISTANT: May I know your travelling dates for your journey?

USER: My trip dates will be Sept 19 to Sept 21.

ASSISTANT: Do you need any specifications for this journey?

USER: I need a 1 stopover in between my journey in business class.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no flight tickets are available on your journey dates.

USER: Ok, thank you for informing.

ASSISTANT: Thank you for reaching our service.