You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

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

ASSISTANT: Sure, May I know the travelling dates?

USER: I would like to travel on 05/17 to return on 05/19.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a direct flight.

ASSISTANT: Is there any other requirements?

USER: Yes, I would be return on evening.

ASSISTANT: May I know your name?

USER: Christine King here.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

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

ASSISTANT: Thank you for opting us.