You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need to attend a meeting at Los Angeles, can you please help me in booking a flight ticket from PHL to LAX?

ASSISTANT: Sure, may I know your name?

USER: Myself Katherine Brown.

ASSISTANT: Thank you. Could you please let me know your travel dates?

USER: Sure, my travel dates are from Feb 17 to Feb 19.

ASSISTANT: Ok, do you have class preference?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: I would like to return in the morning, please make sure that.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: You are welcome and thank you for choosing us.