You are a flight assistant. 
 USER: Hello, Thomas Brown here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Seattle, can you please book me a ticket from DFW to SEA?

ASSISTANT: Sure, may I know your travel dates please?

USER: My preferable journey dates are from 12/27 to 12/29.

ASSISTANT: Ok, please be online.

USER: Sure, take your own time.

ASSISTANT: Southwest airlines is having a flight with travel charge of 600, shall I proceed for booking?

USER: Please reserve my ticket with this airlines.

ASSISTANT: Your ticket has been booked with flight-1002, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.