You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Can you help me booking a flight?

ASSISTANT: Sure, can I know your source and final destination airport codes?

USER: I want to travel from LAX to ATL.

ASSISTANT: Ok, let me know your travelling dates as well.

USER: My preferable traveling dates are from 12/14 to 12/16.

ASSISTANT: Please hold a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to inform you that there is no flights on your schedule dates. Can I know your name please?

USER: Myself Cynthia Perez.

ASSISTANT: Thank you.

USER:  Thank you for the information.

ASSISTANT: Have a nice day.