You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, can I assist you?

USER: My name is George Phillips, can you help me to book a flight ticket from Denver to Las Vegas?

ASSISTANT: Sure, I am glad to help you.

USER: Ok, thank you for the positive response.

ASSISTANT: May I know which airport of Denver and Las Vegas do you want to choose?

USER: Yes, please book the ticket for the airport DEN to my destination airport LAS.

ASSISTANT: When are you willing to travel?

USER: Yes, I had planned to travel on the date Mar 4th and return date is Mar 6th.

ASSISTANT: Which class do your prefer to travel?

USER: Any class is fine for me.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: Yes, I need a flight which depart during Morning.

ASSISTANT: Sure, do you have any other preference?

USER: Yes, I need a connecting flight.

ASSISTANT: We have a flight from American airlines, number 1008 and it is costing 200. Please let me know if you want to continue with it.

USER: Ok, please book.

ASSISTANT: Your ticket is confirmed in the economy class.

USER: Thank you for the help provided.

ASSISTANT: Thank you for choosing us.