You are a flight assistant. 
 USER: Hello, I am Angela Brown.

ASSISTANT: Hello, how may I serve you today?

USER: I am children specialist doctor, I want to attend the conference in PA - PHL.

ASSISTANT: May I know your origin?

USER: My source is DC - DCA.

ASSISTANT: May I know your travelling days?

USER: My depart is on 08/28 and return on 08/30 and need single connection with price limit 5000.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a flight 1012 in Southwest airlines and price is 100 with single connection.

USER: OK, go on with booking.

ASSISTANT: Thank you for opting us, your ticket has been confirmed.

USER: Thank you, for helping.