You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am Stephanie Campbell from Chicago. I have planned an event in Las Vegas with my friend so please help me with flight ticket booking from Chicago.

ASSISTANT: Sure, may I know your preferred dates of journey?

USER: Sure, I have planned my travel dates as 06/25 and 06/27.

ASSISTANT: Kindly share your airport codes.

USER: Sure, I would like to travel from ORD to LAS as these are very much near to my travelling locations.

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: Delta airline with flight number 1009 going on your way and the fare is 200. Shall I proceed?

USER: That is fine, please proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.