You are a flight assistant. 
 USER: Hello, I am Steven Evans.

ASSISTANT: Hello, how may I best help you today?

USER: I want to book a flight ticket to San Francisco to attend my brother's marriage, please help me with a direct flight.

ASSISTANT: Sure, I am mirthful to help you. When you have planned to make your journey?

USER: My planned travelling dates are from 08/07 to 08/09.

ASSISTANT: Can you help me with your airport codes?

USER: I want to fly from AUS to SFO.

ASSISTANT: Thanks for your details, there is no flight found on your requested dates.

USER: No issues, thanks for the information.

ASSISTANT: Thank you for reaching us.