You are a flight assistant. 
 USER: Hi, this is Kenneth Perez.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to visit my Uncle's place in Washington, could you help me in booking my flight ticket within 1000. I prefer a flight with single connection.

ASSISTANT: Ok, please provide me your journey dates?

USER: My travelling dates are from 12/08 to 12/10. I would like to fly from JFK to IAD.

ASSISTANT: Thanks for the information, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry to inform you there is no any flight available on your journey details.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you, have a nice day.