Hi. Melissa Anderson here.
Hello, how may I guide you?
Can you book a ticket from SEA to LGA?
Sure, can I know your preferable dates?
Ok, here are my travelling dates 10/20 and 10/22.
 I found a flight 1025 of UA airlines matches with your preferences, can I proceed?
Please go ahead.
Your ticket is booked.
Thank you for the help.
Thank you, have a good day.