You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a ticket from OAK to LGA. Could you book a ticket?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight ticket?

USER: Travel dates are from Dec, 19 till Dec, 21.

ASSISTANT: May I know your name?

USER: My name is Nicole Lewis.

ASSISTANT: Do you have any other specifications?

USER: I need direct flight.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Thank you.

ASSISTANT: Thanks for approaching us.