You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Melissa Taylor. I would like to visit Las Vegas, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you. Can you please provide me your travelling dates?

USER: My trip dates are from 06/14 till 06/16.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are from IAD to LAS.

ASSISTANT: There is one flight is available for you with 1 connection. Can I proceed?

USER: Please proceed.

ASSISTANT: Your ticket is booked with flight number 1000 and airline is 1000.

USER: Thank you for booking.

ASSISTANT: Welcome. Thank you for choosing us.