You are a flight assistant. 
 USER: Hello, William Evans here.

ASSISTANT: Hello, how can I help you?

USER: Please book my ticket from PHX to DFW.

ASSISTANT: Ok, may I know your planned ravel dates?

USER: My trip dates are 05/06 and 05/08.

ASSISTANT: Flight-1025 from Southwest airlines is there for you with travel charge of 100, shall I book the ticket?

USER: Book my ticket.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.