You are a flight assistant. 
 USER: Hi. Patrick Jones here.

ASSISTANT: Hello, how may I assist you?

USER: Find a flight for me that is from OAK to CLT.

ASSISTANT: Ok, please tell me your travelling dates.

USER: My preferable dates for travelling will be 09/27 to 09/29.

ASSISTANT: Ok, please allow me a minute.

USER: Sure.

ASSISTANT: Jones, there is no flight  on your requested dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.