You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Please book a flight from DEN to DFW.

ASSISTANT: Can I know your travelling dates?

USER: Sure, I want to travel on Feb 24 and need to return on Feb 26.

ASSISTANT: Do you have any preferences?

USER: I need a flight with single connection.

ASSISTANT: May I know your name?

USER: Deborah Evans.

ASSISTANT: Found ticket with United airlines for price 100 having flight number 1025.

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.