You are a flight assistant. 
 USER: Hello, Katherine Collins here.

ASSISTANT: Hello Collins, how may I help you today?

USER: I am planning to go on a short trip to Charlotte, NC - CLT, can you please help me to book a flight from San Francisco, CA - SFO?

ASSISTANT: Sure Collins, can you please mention with your dates of travel?

USER: I will start on 05/31 and return back on 06/02.

ASSISTANT: Please wait for a mean while.

USER: Sure.

ASSISTANT: I found a flight with the connecting flight of fare 100 and the airline is Southwest, are you ok with this booking?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been reserved with the flight number 1020.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a safe journey.