You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to travel from SEA to PHL. Can you please help me to book a ticket?

ASSISTANT: May I know your travel dates?

USER: I want to start on Sept 6 and return on  sept 8.

ASSISTANT: Do you need any connections?

USER: I need a direct flight.

ASSISTANT: Do you have any other preferences?

USER: I would prefer economy class.

ASSISTANT: May I know your name?

USER: Anna Evans here.

ASSISTANT: Sorry to say that, there are no flights found with your details.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.