You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a ticket from HOU to DTW. Could you book a ticket?

ASSISTANT: Sure, may I know your itinerary dates?

USER: Departure is on June, 3 and return will be June, 5.

ASSISTANT: Do you prefer a direct flight?

USER: I would prefer direct flight.

ASSISTANT: May I know your name?

USER: My name is Kenneth Robinson.

ASSISTANT: Sorry Kenneth Robinson, no flights are available on your route.

USER: Thank you.

ASSISTANT: Thank you for reaching us.