You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Charles Hill here. I am planning to book a plane ticket from PHX to IAD, please help me in that.

ASSISTANT: May I know your preferable dates to travel?

USER: My planned travelling dates are from 05/30 to 06/01.

ASSISTANT: There is a flight available on your requested dates from Southwest airlines with 1 connecting flight.

USER: Ok, please proceed and confirm my reservation.

ASSISTANT: Your ticket is booked successfully.

USER: Thank you.

ASSISTANT: Most welcome.