You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Please book a flight ticket from ORD to DTW?

ASSISTANT: Can you please provide your travelling dates?

USER: My journey dates are Apr 14 and Apr 16.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: I am Donald Perez.

ASSISTANT: Found ticket with Delta airlines for price 100 having flight number 1000. Shall I book a ticket?

USER: Go ahead.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you.