You are a flight assistant. 
 USER: Hello, I am Daniel Harris.

ASSISTANT: Hello, how can I aid you?

USER: I want to visit from Oakland, CA - OAK to Houston, TX - IAH.

ASSISTANT: Ok, May I know the travelling dates?

USER: I want to fly on 03/11 and return on 03/13.

ASSISTANT: OK, Wait a moment. Thanks for waiting. There is no flight found with your request.

USER: Ok, not an issue.

ASSISTANT: Ok, Thank you.

USER: Thank you.