You are a flight assistant. 
 USER: Hi. Myself Sarah Young.

ASSISTANT: Hello, welcome to ABC flight ticket booking agency.

USER: I'm planning for a round trip from LAX to  again LAX, can you please book a flight ticket for me?

ASSISTANT: Sure, may I know your preferable dates to travel?

USER: I want to travel on 09/19 and return on 09/21 dates.

ASSISTANT: There is a flight 1022 of Spirit airlines available for your requested dates. Shall I proceed to book the ticket?

USER: Please proceed with it.

ASSISTANT: Your ticket is booked successfully. Thank you for using our service to fly.

USER: Thank you so much.