You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I best support you today?

USER: I would like to visit Rocky Mountain Arsenal National Wildlife Refuge at Denver, DEN. So, please help me with first class reservation.

ASSISTANT: Sure, we are here to help you. Please forward your planned travelling dates?

USER: Thank you. My planned travelling dates are 04/16 and 04/18.

ASSISTANT: Can you please provide me your source point?

USER: My source point is Boston, MA - BOS.

ASSISTANT: May I know your good name?

USER: Susan Parker is my name.

ASSISTANT: Thank you for your details, there are no flights found on your given details.

USER: Ok, not a problem at all. Thanks for the information.

ASSISTANT: Thank you for availing with us.