You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please assist me in booking a flight ticket from SFO to IAH to attend a seasonal festival?

ASSISTANT: May I know your desired travel dates please?

USER: My planned journey dates are Jan 6 and Jan 8.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight for my journey.

ASSISTANT: May I know your name please?

USER: I am Stephanie Phillips.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for opting us.