You are a flight assistant. 
 USER: Hello. Nancy Perez here.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please book me a flight ticket from OAK to AUS?

ASSISTANT: Sure, I am glad to help you. Can I know your travel dates please?

USER: Thank you, my planned trip dates are Nov 17th and 19th.

ASSISTANT: Do you need a stopover?

USER: I need a single stopover.

ASSISTANT: Do you have any specifications?

USER: My depart time must be in the morning time.

ASSISTANT: Please wait a minute.

USER: Ok, sure.

ASSISTANT: There are no flights on your required details.

USER: Ok, not a problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.