You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you assist me to book flight ticket from PHX to DCA?

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

USER: My travelling dates are Sept 22 and Sept 24. I prefer a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I do not have any other specifications.

ASSISTANT: May I know your name please?

USER: I am Jerry Anderson.

ASSISTANT: Jerry Anderson, there are no flights available in your route.

USER: It's ok, thank you for checking.

ASSISTANT: Thank  you for reaching us.