You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I oblige you today?

USER: I would like to attend my friend marriage at Boston, can you please help me to book a flight ticket from SEA to BOS?

ASSISTANT: Sure, when do you want to start and return on?

USER: Sure, my travelling dates are Dec 12 and Dec 14.

ASSISTANT: Do you need a flight with a connection or a direct flight?

USER: I need a single connection flight.

ASSISTANT: Do you have any other specifications?

USER: My class preference is economy.

ASSISTANT: Can I know your good name?

USER: My name is Michael Williams.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for contacting us.