You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you now?

USER: Could you please help me to reserve a flight ticket from HOU to SFO?

ASSISTANT: Ok, may I know your planned trip dates?

USER: I am happy for your quick response. My planned trip dates are March 16th and March 18th.

ASSISTANT: Do you need a connecting flight?

USER: I always prefer a direct flight to travel.

ASSISTANT: Do you have any other requirements?

USER: No, thanks for asking.

ASSISTANT: Meanwhile, may I know your name?

USER: My name is Helen Thomas.

ASSISTANT: Flight-1018 is available for you with 0 connection by Delta airlines which will depart at 19:00. Can I book it?

USER: I am ok with this flight, please do proceed to confirm the flight ticket.

ASSISTANT: Your booking is successfully done. Thank you for choosing us.

USER: Thank you for your guidance.

ASSISTANT: Have a safe trip.