You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to meet my best friend at Washington, can you help me to book a flight ticket from PHX to IAD?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are 21 to 23 of Sep.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: I am Andrew Perez.

ASSISTANT: There is a connecting flight in Southwest airline, can I book it?

USER: Please proceed to booking.

ASSISTANT: Your ticket has been booked with flight number 1005.

USER: Thanks for helping me.

ASSISTANT: Thank you for approaching us.