You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me in booking a flight ticket on 11/23 to CA - OAK?

ASSISTANT: Sure, we are mirthful to help you for booking. Let me know your return date.

USER: Sure, my return date is 11/25.

ASSISTANT: Ok, please share your source point.

USER: My boarding point is from NC - CLT.

ASSISTANT: May I know your name?

USER: Sure, I am Ashley Garcia.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for remaining so positive, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

USER: No worries, I will choose another alternative. Thank you for your support.

ASSISTANT: Thank you for reaching us.