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

ASSISTANT: Hello, how can I help you?

USER: I am planning to attend a seminar on machine learning in Chicago. Could you book my ticket from DCA to ORD?

ASSISTANT: Sure, on which dates are you planning your journey Helen?

USER: My planned dates are 02/25 and 02/27.

ASSISTANT: There is a flight available for you on that route with ticket price of 100 and 1 connection, shall I proceed booking?

USER: Please proceed to book my ticket.

ASSISTANT: Your ticket has been booked with flight-1016 of UA airlines, have a safe flight.

USER: Thank you for assisting me.

ASSISTANT: Thank you so much for choosing us.