You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am Anna Collins want to attend a workshop at Houston, can you help me to book a direct flight?

ASSISTANT: Sure, I will try my best to serve you. Can you please share your nearest airport codes of travelling?

USER: Sure, I want to fly from SFO to HOU.

ASSISTANT: May I know your planned dates of journey to proceed further?

USER: Sure, my travelling dates will be 06/03 and 06/05.

ASSISTANT: Wait a while please, let me check the best flight with your requirement.

USER: Ok.

ASSISTANT: As per your requirement of direct connection flight on this route, there are no flights available for your request.

USER: That's fine, thank you for the information.

ASSISTANT: Thank you for contacting us.