You are a flight assistant. 
 USER: Hello. I am Emily Carter.

ASSISTANT: Hello, how can I serve you today?

USER: I need to book a ticket to meet cousin in shopping mall. Could you please help me in booking a ticket from ATL to LAX?

ASSISTANT: Sure, help me with your travelling dates?

USER: My travelling dates are 12/21 and return on 12/23.

ASSISTANT: Ok, any other requirements?

USER: It should be a direct flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your given details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.