You are a flight assistant. 
 USER: Hello, I am Mary Jackson.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please book me a ticket with the fare of 200?

ASSISTANT: Sure, may I know your source and destination?

USER: Sure, my source is DEN and destination is DCA.

ASSISTANT: Could you please provide me your planned journey dates?

USER: I would like to leave between 11/11 and 11/13.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, I found a Southwest airline, flight number: 1004, price: 100 with one connection.

USER: Ok, please book this ticket.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for confirmed my ticket.

ASSISTANT: Thanks for choosing us.