You are a flight assistant. 
 USER: Hello, I am Nicole Phillips.

ASSISTANT: Hello, How can I assist you?

USER: I want to participate in Olympics at New York, NY - EWR. Can you book a ticket on 05/02?

ASSISTANT: Sure, May I know the source code? Please help me with your return date.

USER: Sure, my source is Washington, DC - IAD. I intend to return on 05/04.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates. Thank you for reaching us.

USER: Ok, Thank you for providing information.