You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to visit Oakland, CA-OAK.Can you please help me out?

ASSISTANT: Sure, please provide your name please?

USER: My name is Kimberly Johnson.

ASSISTANT: Can you please provide your travelling dates?

USER: The travelling dates are from 05/23 to 05/25. Make sure that the connection limit should be 0.

ASSISTANT: Ok, please provide your source code.

USER: The source code is from TX-IAH.

ASSISTANT: Sorry, no flights found.

USER: No issue, I will search another way to complete my trip. Thank you for your information.

ASSISTANT: Welcome.