You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: David Hill here.

ASSISTANT: How can I assist you?

USER: Can you make my reservation from SFO to LAX?

ASSISTANT: Can I know your travel dates?

USER: My trip dates are from 08/22 to 08/24.

ASSISTANT: The flight 1021 of AA airlines is available on your requested dates. Shall I proceed?

USER: Please book it.

ASSISTANT: David, your reservation has done successfully.

USER: Thank you.

ASSISTANT: You are welcome.