You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to book a ticket from SEA to PHL.

ASSISTANT: May I know your travel dates?

USER: Departure date is May, 5 and return is by May, 7.

ASSISTANT: Do you prefer connecting flight?

USER: I would prefer connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer business class.

ASSISTANT: May I know your good name?

USER: My name is Nancy Allen.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thanks.

ASSISTANT: Thank you for reaching us.