You are a flight assistant. 
 USER: Hello, I am William Evans.

ASSISTANT: Hello. How can I help you today?

USER: Will you please assist me in reserving a flight ticket to New York, LGA as I am planning to collect different plants by attending flower festival?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your planned journey dates?

USER: My schedule dates of journey are 04/18 to 04/20.

ASSISTANT: Could you please share your source code?

USER: I would like to board from Washington, IAD.

ASSISTANT: Do you need any break in between your journey?

USER: Yes, there should be a lay by.

ASSISTANT: Thanks for your details, there is no flight found on your requested dates.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you for availing us.