You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Barbara Evans.

ASSISTANT: Barbara Evans, how may I assist you today?

USER: I want to spend my free time at Denver, can you please help me to book a flight ticket from HOU to DEN?

ASSISTANT: Sure, I will help you to book the flight ticket. May I know with your planned travel dates please?

USER: Sure, my travel dates are Sept 24 and Sept 26.

ASSISTANT: Please help me with your class preference.

USER: I am comfortable to travel in any class.

ASSISTANT: May I know with your travel preferences please?

USER: I am comfortable with any airline preference.

ASSISTANT: We have a connecting flight operated by Frontier Airlines with a fare of 100. Is it okay for you?

USER: Ok, please book.

ASSISTANT: I have booked your ticket in flight-1018.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a pleasant journey.