You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William Moore here.

ASSISTANT: How may I help you?

USER: I would like to visit Denver to met my friends, please help me in booking a ticket from DEN to DEN.

ASSISTANT: Sure, I am glad to help you. Can you please provide me your trip dates?

USER: My planned journey dates are 08/10 and 08/12.

ASSISTANT: Ok, wait for a while.

USER: Sure, take your time.

ASSISTANT: The Delta airlines are providing a flight having a connection limit 1 with the ticket fare is 100 if you are ok with this please inform me to book a ticket.

USER: Ok, please book my ticket.

ASSISTANT: Ok, your ticket is booked with flight number 1020.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.