You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Patrick Carter. I need to fly from DFW to SFO to meet my parents, can you please book a flight ticket?

ASSISTANT: Sure, can I know your trip dates?

USER: My journey dates are 11/11 to 11/13.

ASSISTANT: We found a flight on UA airline, flight number as 1009 with the fare of 100.

USER: Ok, book the ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you.