You are a flight assistant. 
 USER: Hello, Michael Green here.

ASSISTANT: Hello, how may I help you?

USER: I want to attend for an seminar in George Washington University in Washington, can you help me for booking a flight ticket with the price limit of 5000?

ASSISTANT: Sure, we are here to serve you. May I know your travelling dates?

USER: My travelling dates are from 08/28 to 08/30.

ASSISTANT: Ok, can you provide your source and destination codes?

USER: My source is New York, NY - EWR. Destination is Washington, DC - DCA.

ASSISTANT: Ok, please give me a moment I will check the availability and get back to you.

USER: Sure.

ASSISTANT: Do you have any other requirements?

USER: I want only one connection.

ASSISTANT: Thanks for your time. Sorry we did not find any flights at this moment according to your request.

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

ASSISTANT: Thank you for reaching us.