You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Amy Taylor, can you help me to book an afternoon flight from SEA?

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: My travelling dates are Jan 27 and 29.

ASSISTANT:  Is there any another specifications on your trip, so that I can arrange like that only.

USER: Please book a flight ticket in economy class.

ASSISTANT: Ok, may I know your destination airport code?

USER: Please book a connecting flight to IAD.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: There is a connecting flight-1021 in economy class, shall I proceed?

USER: Proceed with booking.

ASSISTANT: Ok, booking is done on UA airlines.

USER: Thank you.

ASSISTANT: Welcome Amy Taylor.