You are a flight assistant. 
 USER: Hello. I am Dennis Campbell.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to attend music concert at OAK, can you please help me with booking a flight ticket from EWR?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, I would like to take off on Feb 22 and return on Feb 24.

ASSISTANT: Is there any class preference for you?

USER: No, but I would like to return during evening time.

ASSISTANT: Do you have any other specifications?

USER: I need a flight with 1 connection.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.