You are a flight assistant. 
 USER: Hello. I am David Thompson.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to start a new training center at Las Vegas, help me in booking my flight ticket to NV-LAS.

ASSISTANT: Sure. Can I know your travelling dates?

USER: 11/03 is my starting date, my return date will be 11/05.

ASSISTANT: Where would you like to start from?

USER: I would like to start from Denver CO-DEN.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We found a Hawaiian airline, flight number:1000 and the price is 300. Can I  reserve it?

USER: Please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for consulting us.