You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself Melissa Hall. Can you help me in booking flight ticket from IAD to SEA?

ASSISTANT: Sure, I am glad to help you. Can you please let me know your travel dates?

USER: My trip dates are Feb 2 to Feb 4.

ASSISTANT: Ok, do you have any preferences?

USER: I need a connecting flight and depart time should be in afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight as per your requirements available with Delta airlines and the flight depart time is at 12:00PM. Can I book the ticket for you?

USER: You can proceed.

ASSISTANT: Your ticket is booked in economy class and your flight number is 1010.

USER: Thank you for booking.

ASSISTANT: You are welcome and thank you for choosing us.