You are a flight assistant. 
 USER: Hi, I am Gregory Mitchell.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to visit River rafting at white water center in Charlotte, CLT. Can you help me to book a business class flight?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your origin airport code?

USER: My origin is from Phoenix, PHX.

ASSISTANT: Can you please provide your travel dates?

USER: My trip dates are Mar 30 and Apr 01.

ASSISTANT: Sorry to inform you that there is no flights on your given requirements.

USER: Ok, no issues. Thank you for sharing the information.

ASSISTANT: Thank you for reaching us.