You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER:  I am Kenneth King want to visit AZ-PHX to attend a business meeting. Can you book a ticket on 08/05?

ASSISTANT: Sure, can you please mention your connection limit?

USER: I need  a single connection.

ASSISTANT: May I know return date?

USER: I will return on 08/07.

ASSISTANT: Kindly mention your origin point?

USER:  I will depart from DC-IAD.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We are sorry to inform you, there is no flights found matching your criteria.

USER: Ok, thank you for providing information.

ASSISTANT: Thank you for choosing our service. Have a great day.