You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Sharon Roberts. I am planning to visit Downtown Aquarium in Houston, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My travelling dates are 12/22 and 12/24.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are from SFO to HOU.

ASSISTANT: Give me a moment.

USER: I need a direct flight.

ASSISTANT: Flight 1001 in Spirit airline with 0 connection and fare is 100. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Welcome, have a safe flight.