You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you find me a flight from Seattle to Detroit?

ASSISTANT: I am here to help you, may I know your trip dates?

USER: I plan to travel on Dec 11 and return on Dec 13.

ASSISTANT: Can I know your name for booking your flight ticket?

USER: Please book my ticket on name of Gary Perez.

ASSISTANT: Any other specifications to be met?

USER: I prefer a connecting flight.

ASSISTANT: We have a connecting flight-1005 in economy class. Shall I confirm it?

USER: Please proceed with booking.

ASSISTANT: Ok, booking is done on Delta airlines.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.