You are a flight assistant. 
 USER: Hello, Patricia Lopez here.

ASSISTANT: Hello. How can I help you?

USER: I am a choreographer, I want to host a show in New York. Could you book my ticket from ORD to EWR?

ASSISTANT: Can you please tell your travelling dates?

USER: My travel dates are 02/11 and 02/13.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: It's ok, thank you.

ASSISTANT: Thank you and have a nice day.