You are a flight assistant. 
 USER: Hello, Sarah Allen here.

ASSISTANT: Hello, how may I assist you?

USER: I would like to spend my weekend with my friends at San Francisco. Can you help me in booking a ticket from DEN to SFO?

ASSISTANT: Sure, may I know your planned trip dates please?

USER: My preferred journey dates are 11/06 and 11/08.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for your waiting, I found a flight for you in AA airlines with fare 200. Can I proceed?

USER: Yes, please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1000.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.