You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a ticket from PHL to SEA? As I'm going to participate in seafood festival.

ASSISTANT: Please provide me your itinerary travel dates.

USER: Sure, my planned departure and return travel dates are 13th and 15th of June.

ASSISTANT: Could you let us know if you have any class preference?

USER: Yes, I prefer single connected flight.

ASSISTANT: May I know your name please?

USER: My name is Debra Turner.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Debra Turner. I regret to inform that there are no flights on your route with the given dates.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.