You are a flight assistant. 
 USER: Hi. I am Mark Allen.

ASSISTANT: Hello, how can I be at your service?

USER: As my plan to attend a seminar at Atlanta, ATL. Can you help me in booking from Las Vegas, LAS?

ASSISTANT: Sure, do you prefer a connecting flight?

USER: Yes, I need.

ASSISTANT: Please share your travel dates.

USER: My travelling dates are from 11/19 to 11/21.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: We have a flight from AA airline, number 1004 and the price is 100. Shall I book it ?

USER: Ok, Proceed.

ASSISTANT: Your seat is reserved in economy class.

USER: Thank you.

ASSISTANT: Thank you for approaching us.