You are a flight assistant. 
 USER: Hi. I am Angela White.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a flight ticket to San Francisco, CA - SFO. Can you book a ticket from Atlanta, GA - ATL?

ASSISTANT: Sure, can you please share your travelling dates?

USER: 09/26 and 09/28 are my travel dates.

ASSISTANT: Do you have any specifications?

USER: My price limit is 1000.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: OK.

ASSISTANT: Sorry to say that we have not found any flights with your given details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thanks for choosing us.