You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Katherine Taylor. Can you please find a flight availability from Atlanta to San Francisco?

ASSISTANT: Sure, help me with the trip dates?

USER: Ok, my scheduled travel dates are Apr 16 and Apr 18.

ASSISTANT: May I know your airport codes that you choose to board and land?

USER: The boarding and landing airport codes are ATL and SFO.

ASSISTANT: We found a flight in an airline Frontier with 1004 numberhaving a direct connection price of 200. Shall I proceed to book?

USER: Yes, please do proceed with the ticket booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.