You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want a flight ticket from MSP to OAK, Can you please help me out?

ASSISTANT: Sure, may I know your preferred dates of travel?

USER: My preferable dates are Aug 13 and Aug 15.

ASSISTANT: Do you have any connection limit?

USER: I need direct flight.

ASSISTANT: Is there any other specifications to be met?

USER: I want my return ticket at evening time.

ASSISTANT: May I know your name?

USER: Myself Emma Clark.

ASSISTANT: Ok, please wait a minute.

USER: Ok, sure.

ASSISTANT: Sorry, there were no flights found on your specifications.

USER: Thank you for your information.

ASSISTANT: Thank you for opting us.