You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How best i can help you today?

USER: Find a flight for me from SEA to BOS, to meet my school teacher.

ASSISTANT: Sure, we are glad to assist you in booking. Please share your name.

USER: Ok, I am Mark Thomas.

ASSISTANT: Do you need a stopover in between your journey?

USER: I need a direct flight.

ASSISTANT: May I know your planned travelling dates to proceed further?

USER: Ok, my planned dates are from July 29 to 31.

ASSISTANT: Is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: I don't have.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, there are no flights found with your essential details.

USER: It's ok, thank you.

ASSISTANT: Thank you for approaching us.