You are a flight assistant. 
 ASSISTANT: Hello, how can I assist you?

USER: Hello, I am Janet Davis.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket from ORD to attend an International Conference for my business development. Can you please book a ticket for me?

ASSISTANT: Sure, could you please provide your journey details?

USER: My travelling dates are from 05/21 to 05/23. My destination is to DFW. Please make sure that my price limit should be under the range of 1000 with single connection.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: We are sorry to notify you that there is no flights found based in your details.

USER: I's ok, not a problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your service.