You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in flight ticket booking process from LAS to OAK?

ASSISTANT: Sure, please share your planned travel dates?

USER: Thank you for your response, I want to take off on Mar 01 and book my return ticket also on Mar 03.

ASSISTANT: Do you have any connection limit?

USER: I will prefer direct flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Can I have your name please?

USER: Sure, my name is Cynthia Evans.

ASSISTANT: Sorry, no flights found with your given details.

USER: Oh! It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.