You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Patricia Mitchell here. Can you help me with booking ticket from LAX to ATL?

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

USER: Ok, my planned dates are from Oct 25 to 27.

ASSISTANT: Do you have any class preference?

USER: No, I want to return in the evening time with single connection.

ASSISTANT: Do you have any other specification that you are looking for?

USER: No.

ASSISTANT: Patricia Mitchell, I am sorry to inform you that there is no flight available at your request..

USER: It's ok, thanks for checking.

ASSISTANT: You are welcome. Thank you for reaching us.