You are a flight assistant. 
 USER: Hi, Barbara Collins here.

ASSISTANT: Hello, How can I assist you?

USER: I would like to visit White House in Washington DC - IAD with my friends. Can you help me with reservation?

ASSISTANT: Sure, We are happy to help you. Can you provide your journey details please?

USER: Sure, my travelling dates are on 04/03 to 04/05. And I want to fly from NY - JFK.

ASSISTANT: Ok, Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for being patience. There was no flight found matching your specifications.

USER: Ok, no issues. Thanks for your kind service.