You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I would like to meet my friend as he is unwell, could you please help me to book my flight ticket from ATL to DEN?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I will depart on Apr 15th and return back on Apr 17th.

ASSISTANT: Do you have any preferences?

USER: I prefer for a normal-cost airline.

ASSISTANT: May I know your name please?

USER: My name is Kathleen Thompson.

ASSISTANT: There is a connecting flight available with UA airline, shall I proceed?

USER: Yes, please book the ticket for me.

ASSISTANT: Your booking is done with flight number 1016. Happy journey.

USER: Thank you very much for your help.

ASSISTANT: You are welcome, have a nice day.