You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Gregory Lee. I am looking for a flight from ORD to SEA, can you help me in booking?

ASSISTANT: Sure, can I know your travelling dates?

USER: Sure, my planned travel dates are Feb 16 and Feb 18.

ASSISTANT: Do you have any particular time for departing and returning?

USER: Yes, I would like to start journey for the evening flight.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I would like to prefer connecting flight.

ASSISTANT: We found Delta airline with price 300 and economy class and airline number is 1005 with arrival time is 01 AM and departure time is 02 AM, Shall I proceed for booking?

USER: That's fine, please proceed in booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your excellent service.

ASSISTANT: Thank you for reaching us.