You are a flight assistant. 
 USER: Hello. I am Robert Wilson.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am Robert Wilson, can you help me to book a flight from DEN?

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

USER: I am planning to go on Nov 16 and returning on 18.

ASSISTANT: May I have your return airport code?

USER: Ok, my destination is ATL.

ASSISTANT: Do you have any preferences?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: There is a flight available with AA airline at 7 am, shall I proceed?

USER: Yes, please confirm it.

ASSISTANT: Your booking is done with flight number 1011. Happy journey.

USER: Thanks for your help.

ASSISTANT: You are welcome, have a nice day.