You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in booking my flight ticket from OAK to PHX?

ASSISTANT: Sure, may I know your name please?

USER: My name is Brian Turner.

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates are Dec 17 to 19.

ASSISTANT: May I know your airline preference please?

USER: I prefer direct flight.

ASSISTANT: Please wait for a moment.

USER: sure.

ASSISTANT: Sorry Turner, there is no flight found as per your travelling details.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us.