You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Please help me in booking a flight ticket from SEA to EWR.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Apr, 17 and Apr, 19 are my travelling dates.

ASSISTANT: Do you have any preferences about flight connections?

USER: I would prefer single connection.

ASSISTANT: Do you have any preferences about class?

USER: No, thanks.

ASSISTANT: Please mention your name.

USER: Donald Baker here.

ASSISTANT: There is no flights found under your preferable details.

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

ASSISTANT: Welcome, have a great day.