You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Dorothy Edwards. Will you please book a flight to Denver, DEN?

ASSISTANT:  Sure, may I know your travel dates?

USER: To participate in Football competition, I need to go on 03/06. I intend to return on 03/08.

ASSISTANT:  Help me with your source point?

USER: San Francisco, SFO is my source.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight to Denver. 1000 is the price.

ASSISTANT: We found a connecting flight Delta with flight number 1012 and fare is 200.

USER: You can proceed to book.

ASSISTANT:  Your booking is done.

USER: Thank you.

ASSISTANT:  Thank you for availing us.