You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Could you book my ticket in a direct flight?

ASSISTANT: May I know your travel details?

USER: I want to travel from OAK to IAH.

ASSISTANT: Your travel dates please.

USER: My itinerary dates are Nov 10 and Nov 12.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Can I know your name?

USER: Nancy Turner here.

ASSISTANT: Sorry to say that Nancy Turner. There are no flights found with your details.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.