You are a flight assistant. 
 USER: Hi. I am Dorothy Clark.

ASSISTANT: Hello. How may I assist you today?

USER: I am very much Excited to visit Ellenville Fault Ice Caves in New York SFO. Please book me a plane ticket from IAD.

ASSISTANT:  Sure, we are here to make your journey comfort. Do you prefer any halt in between journey?

USER: I need a connecting flight.

ASSISTANT: May I know on what dates would you like to travel?

USER: My trip dates are 08/22 to 08/24.

ASSISTANT: How much you can spend for airfare?

USER: My fare is 200.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: No issue, thank you.

ASSISTANT:  Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: That's ok.

ASSISTANT: Thanks for consulting us.