You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket from OAK to LAX, Can you please help me for booking?

ASSISTANT: Sure, can I have your travel dates?

USER: I would like to travel on 08/09 to return on 08/11.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your class preference?

USER: i want to fly with economy class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please share your name to proceed further.

USER: John Thompson.

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

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for approaching us.