You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me with flight ticket booking which will depart in the evening time?

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: My desired travel dates are 10th Aug and please book the return ticket also on 12th of Aug.

ASSISTANT: May I know your airport codes?

USER: My genesis airport code is JFK and my terminus airport code is OAK.

ASSISTANT: Do you have any requirements?

USER: I need a single stop and go flight.

ASSISTANT: May I know your name?

USER: My name is Edward Garcia.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: That's fine, I can reach my destination with any other source. Thank you for your help.

ASSISTANT: Thank you.