Hello.
user
Hello.
assistant
Dennis Hall here.
user
Dennis, how can I aid you?
assistant
I want to book a flight ticket for my two days trip from 04/01 to 04/03, can you help me?
user
Can I know your airport codes please?
assistant
My desired airport codes are from PHL to BOS. I need  direct flight.
user
Sorry Hall, no flight is available.
assistant
Oh! That's sad. Thank you for checking.
user
Thank you for contacting us.
assistant