You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Anna Hall.

ASSISTANT: Anna, how may I help you today?

USER: I want to fly from MSP to OAK as I need to attend my father retirement. My travelling dates are 08/27 to 08/29.

ASSISTANT: That's great to hear, can I have your journey dates Anna? Please wait a moment.

USER: Ok.

ASSISTANT: Sorry Anna, we could not found any flights on your requested dates.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you for approaching us Anna.