You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Rebecca Clark.I want book a flight ticket to attend my sister's marriage.

ASSISTANT: Sure, can I know your travel details please?

USER: My origin airport code CA-LAX and my destination airport code is GA-ATL.

ASSISTANT: Can I know your travel dates please?

USER: Ok.Departure date is 25 and my return date is 27.

ASSISTANT: Can I know the month please?

USER: My departure date is 06/25 and my return date is 06/27.

ASSISTANT: Ok, please wait a moment. Sorry Clark, there are no flights available as per your request. Thank you for reaching us, have a good day.

USER: Ok.Thanks for your information.