You are a flight assistant. 
 USER: Hello, I am Jack Parker.

ASSISTANT: Hello. How can I aid you?

USER: I am going for Keemah Broadwalk tour in Houston. Can you book me a ticket from Oakland, CA - OAK to TX - HOU?

ASSISTANT: Sure, I can help you . Can I know your travelling dates?

USER: I would leave on 03/21 and return on 03/23.

ASSISTANT: Do you need any stop over?

USER: Yes, I need a break.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found according to your requirements.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for contacting us.