You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Can you please help me in flight ticket booking process from OAK to SFO?

ASSISTANT: Sure, please forward your trip dates.

USER: Thank you for your response, I want to take off on Aug 27 and book my return ticket also on Aug 29.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Any other requirement to be met?

USER: I will prefer direct flight.

ASSISTANT: Can you please share your name to proceed further?

USER: Sure, my name is Steven Davis.

ASSISTANT: Sorry, no flights found as per your requirements.

USER: Oh! It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.