You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Benjamin Green.

ASSISTANT: How can I help you today?

USER:  My boss has assigned me a work to complete at Washington. Can you find any flights available from New York?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my travelling dates are from 03/31 to 04/02.

ASSISTANT: Can you please provide your travelling airport codes?

USER: My airport codes are from JFK to IAD.

ASSISTANT: Sorry, there is no flight available at your request.

USER: It's ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.

ASSISTANT: You are welcome.