You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Joseph Collins here, I want to reserve my ticket from DEN to DEN for a city roundup trip at Denver, can you please help me?

ASSISTANT: May I know your travel dates?

USER: Sure, my dates of journey is from 06/28 to 06/30. Please make sure that the connections limit is 1.

ASSISTANT: There is a flight with flight number 1005 with price is 100, can I proceed?

USER: Ok, you can book it.

ASSISTANT: Your booking is done in UA airlines.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.