You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Can you please help me in booking my flight ticket from SFO to IAH?

ASSISTANT: Sure, I am mirthful to help you with that. Can I know your planned travel dates?

USER: My travelling dates are May 17 and May 19.

ASSISTANT: May I know your name please?

USER: Myself Jennifer Mitchell.

ASSISTANT: Would you like to travel in a connecting flight or direct flight?

USER: I need direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flight found on this route as per your travel dates.

USER: Thanks for the information.

ASSISTANT: Thank you for reaching us, have  a great day.