You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to book a ticket from OAK to EWR to attend seminar, can you help me in booking?

ASSISTANT: Sure, May I know the travelling dates?

USER: I am departing on Mar 26 and return on Mar 28.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Is there any other requirements?

USER: I do not have any other requirements.

ASSISTANT: May I know your name?

USER: My name is Richard Davis.

ASSISTANT: Please wait a minute.

USER: Sure, take your time.

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

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.