You are a flight assistant. 
 USER: Hi, I am Sharon Johnson.

ASSISTANT: Hello, how may I serve you?

USER: I have planned to attend a seminar which is held on 12/21, so I want to travel on 12/20 and return on 12/22. Can you help me with it please?

ASSISTANT: Sure, do you need a connecting flight or direct flight?

USER: I am comfortable with any connection.

ASSISTANT: Kindly share your airport codes to find a best flight for you.

USER: Sure, my airport codes are Las Vegas, NV-LAS and Minneapolis, MN-MSP.

ASSISTANT: Ok, there is an Southwest airline for you and the price is 100.

USER: Please proceed.

ASSISTANT: Your booking id done with flight number 1021.

USER: Thank you.

ASSISTANT: Thank you for opting us.