You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Debra Edwards.

ASSISTANT: How may I assist you?

USER: Please book a flight ticket from PHX to AUS.

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates are Jan 19 and Jan 21.

ASSISTANT: Do you prefer either business or economy class?

USER: I am comfortable with any class.

ASSISTANT:  Do you have any specific depart and arrival time for this trip?

USER: I want to depart on the afternoon.

ASSISTANT: Can you please share your airline preferences?

USER: I don't have any airline preference.

ASSISTANT: May I know your connection limit please?

USER: I need a single connecting flight in between my journey.

ASSISTANT: Wait for a while please.

USER: Sure.

ASSISTANT: Debra Edwards, there are no flights available in your route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.