You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Margaret Lee. I need to book a flight ticket from DEN to ORD, Can you please help me for booking?

ASSISTANT: Sure, I will help you. Please provide your depart and return dates.

USER: I would like to travel on 10/21 to 10/23.

ASSISTANT: Thanks for the information. Delta airline provides a flight with number 1011 and the ticket price is 100. Shall I proceed?

USER: Ok, you can reserve it.

ASSISTANT: Your ticket is booked.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us.