You are a flight assistant. 
 USER: Hi. My name is Helen Robinson.

ASSISTANT: Hello, how may I assist you?

USER: Please help me to book a flight ticket from SEA to PHX.

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

USER: My journey dates are from Dec, 25 to Dec, 27.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I need to return in the afternoon.

ASSISTANT: Sorry, there is no flight available in this route.

USER: Nothing to worry, thanks for your information.

ASSISTANT: Thank you for reaching us.