You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Carolyn Mitchell. Can you help me to book a flight ticket for the dates Aug 12th and 14 respectively?

ASSISTANT: Sure, could you please share your location airport code?

USER: Ok, please book a ticket from HOU to DEN.

ASSISTANT: Ok, may I know your departure and return time?

USER: Ok, please check for a flight whose arrival time is during evening.

ASSISTANT: Ok, in which class you need booking?

USER: No, I don't need anything else.

ASSISTANT: Ok, please allow me a moment.

USER: Ok, please take your time.

ASSISTANT: The business class with flight number 1028 of AA airline is available having fare as 1100 and connection as 1, is it ok for you?

USER: Ok, please book.

ASSISTANT: Ok, your reservation is confirmed. The departure time is 17:00 PM and the return time is 2:00 AM.

USER: Ok, thank you for the help.

ASSISTANT: You are welcome, have a great day.