You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Melissa Adams.

ASSISTANT: How can I aid you?

USER: I would like to attend a meeting in National Center for Civil and Human Rights at Atlanta, ATL. Can you please book me a ticket from Las Vegas, NV-LAS?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My travelling dates are from 01/05 to 01/07.

ASSISTANT: Do you need any break?

USER: Yes, I need a break.

ASSISTANT: We found a UA airline, flight number:1002 and the price is 200.

USER: Please proceed for booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for aiding me.

ASSISTANT: Thank you for reaching us.