You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am looking for a flight from JFK to OAK, can you help me in booking?

ASSISTANT: Sure, I am here to aid you. May I know your planned dates?

USER: Sure, my planned travel dates are Aug 25 and Aug 27.

ASSISTANT: Ok, please share your class preference.

USER: No, I don't have any class preference.

ASSISTANT: May I know your name please?

USER: Myself Ryan Walker.

ASSISTANT: Do you prefer a connected flight or a direct flight?

USER: I need a direct flight for this journey.

ASSISTANT: Is there any other concerns?

USER: I prefer for a normal-cost airlines.

ASSISTANT: Ok, please wait.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say that, no flights are found based on your given information.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.