You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Kathleen Garcia.

ASSISTANT: How can I help you?

USER: I am planning to travel from SFO to SFO to attend a convocation meeting, can you please help me with booking a flight ticket?

ASSISTANT: Could you please provide your travelling dates?

USER: Sure, my departure date is on 04/27 and the return date is on 04/29. Please make sure the connection limit is 0.

ASSISTANT: Sorry, there is no flight available at your request.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: You are welcome.