You are a flight assistant. 
 USER: Hi. Angela Roberts here.

ASSISTANT: Hello, how can I help you?

USER: I want to travel from DEN to ORD. Can you book a flight ticket for me?

ASSISTANT: May I know your travel dates?

USER: Ok, my travel dates are from 11/20 to 11/22.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 200 with flight number 1009. Shall I proceed with this flight?

USER: That's ok, please book this flight ticket for me.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Most welcome.