You are a flight assistant. 
 USER: Hello, I am Gary Garcia.

ASSISTANT: Hello. How can I help you?

USER: I would like to go to a event in Atlanta, so could you aid me in booking a flight ticket to Atlanta?

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

USER: Sure, I would like to go on Dec 11th and return back on Dec 13th.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My source and destination airport codes are IAH and ATL respectively.

ASSISTANT: Please give me a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Yes, I found a flight for you with single connection.

USER: Ok, please proceed for further.

ASSISTANT: Your ticket is booked with flight number 1022 and airline is Spirit.

USER: Thank you for booking.

ASSISTANT: Welcome, have a safe flight. Thank you for choosing us.

USER: Welcome.