You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Michelle Moore.

ASSISTANT: How may I help you today?

USER: I have a plan to meet my friend in Las Vegas. Can you help me for booking a flight ticket from ORD to LAS?

ASSISTANT: Sure, may I know the travelling dates?

USER: My travelling dates are Aug 25 and Aug 27.

ASSISTANT: Do you need any specifications for your journey?

USER: I need a single connecting flight.

ASSISTANT: Please hold a moment. There is a flight with one connection and the price is 100 in Delta airlines, can I proceed with the reservation?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been reserved with the flight number 1002.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing our service. Have a safe journey ahead.

USER: Welcome.