You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I help you?

USER: I need a ticket from Atlanta, GA-ATL to Oakland, CA-OAK. My name is Elizabeth Lewis.

ASSISTANT: Sure, May I know the journey dates?

USER: Departure date is 08/24 and will return by 08/26.

ASSISTANT: Please give a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for reaching us.

USER: Thanks.