You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you on this moment?

USER: Myself Alexander Mitchell from Philadelphia. I have a meeting in Seattle, can you please find a flight form my origin location and book for me?

ASSISTANT: Sure, can I know the travel dates please?

USER: Sure, my travelling dates are from 01/21 and 01/23.

ASSISTANT: Could you provide the airport codes of Philadelphia and Seattle?

USER: Sure, airport codes of my trip are PHL-SEA.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: As per your request there is a flight in UA airline, shall I book it?

USER: Sure, please proceed with it.

ASSISTANT: Your ticket has been booked with flight number 1017.

USER: Thank you so much.

ASSISTANT: You are welcome, visit us again.