You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: My name is Steven Hernandez, I am looking for a flight in evening from San Francisco to attend family meeting. Can you help me with booking?

ASSISTANT: Sure, please share me your trip dates.

USER: I will fly on July 2nd and return on July 4th.

ASSISTANT: May I know your source and destination airport codes?

USER: My source point is SFO and my destination is EWR.

ASSISTANT: is there any class preference for you?

USER: No.

ASSISTANT: Do you prefer any lay by in between your journey?

USER: I need a flight with single connection.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: I want my departure flight in evening.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Thank you for the information.

ASSISTANT: Thank you for availing us.