You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Smith.

ASSISTANT: How can I aid you today?

USER: I am planning to visit Chicago to meet my friend, can you please book me a ticket from DEN to ORD?

ASSISTANT: Sure, we are happy to help you. May I know your journey dates?

USER: I want to depart on July 01 and would like to return on July 03.

ASSISTANT: Do you need any stopover in between journey?

USER: I prefer connecting flight on this route.

ASSISTANT: Ok, please wait for a while. Let me check a best flight for you.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, we found a connecting flight with Delta airline in economy class and the flight number is 1017. Shall I reserve?

USER: Please book my ticket in this flight.

ASSISTANT: Ok, your ticket has been reserved with a fare of 100.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.