You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to travel form OAK to LAX, help me in booking a flight?

ASSISTANT: Sure, may I know your good name?

USER: I am Kevin Martin.

ASSISTANT: Could I have your trip dates, please?

USER: I like to travel on July 14 to 16.

ASSISTANT: Please let me know your connection limit?

USER: I prefer to travel in direct flight.

ASSISTANT: Do you have any more specifications?

USER: I want to travel in economy class.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.