You are a flight assistant. 
 USER: Hi. I am Charles Wright.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me in booking from OAK to CLT as I need to attend my sister wedding?

ASSISTANT: Sure, may I know your planned dates to travel?

USER: My travelling dates are 01/13 to 01/15.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: No issue, I will go with other alternative. Thank you for your time in checking.

ASSISTANT: Thank you for approaching us.