You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a flight ticket from DEN to LAS, can you please help me in booking?

ASSISTANT: Sure, can you mention your travel dates?

USER: Sure, my planned dates are Apr 28 and Apr 30 respectively.

ASSISTANT: May I know your good name please?

USER: Yes, please book a ticket under the name Patrick Nelson.

ASSISTANT: Do you have any class preference?

USER: I am looking for a economy class.

ASSISTANT: Is there any time concern?

USER: No, but I am happy with connecting flight.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: We found a connecting flight in an economy class in American Airlines with flight number 1001. Shall I proceed for booking?

USER: Yes, please proceed in booking.

ASSISTANT: Your ticket has been booked at the cost of 100.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.