You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I helpful to you?

USER: I am Susan Anderson. I am planning to watch a best amazing places at Chicago, help me in booking my flight ticket from Oakland.

ASSISTANT: Sure, let me have your journey dates?

USER: My travelling dates will be 05/18 to 05/20.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a direct flight.

ASSISTANT: Ok, please mention your airport abbreviates?

USER: My source point is CA-OAK, my landing point is IL-ORD.

ASSISTANT: Sorry, no flights found based on your requested dates.

USER: Its ok, thank you.

ASSISTANT: Thanks for communicating with us.