You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to book a flight ticket from HOU to SEA to enjoy Innovation festivals.

ASSISTANT: Sure, may I know your name?

USER: Sure, Debra Brown here.

ASSISTANT: Can I know your journey dates?

USER: Sure, my journey dates are Apr 21 and Apr 23.

ASSISTANT: Do you need a connecting flight or direct flight?

USER: I need a direct flight.

ASSISTANT: May I know your flight timing?

USER: I am comfortable with any timing.

ASSISTANT: Sorry, currently there are no flights on your request.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.