You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Brian Lewis. I am planning to travel from ORD to LAX.

ASSISTANT: May I know your travelling dates?

USER: My travelling date are 06/11 to 06/13.

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.