You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Samuel Williams. I would like to book a ticket from SEA to DFW, can you please help me out?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I am travelling on these dates Jan 28th and 30th.

ASSISTANT: Do you have any specifications?

USER: I need departure time in the afternoon.

ASSISTANT: Do you have any class preference?

USER: I need a single connected flight.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.