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

ASSISTANT: Hello. How can I help you?

USER: I am a singer, I have to participate in a contest at New York. Could you book my ticket from BOS to EWR?

ASSISTANT: Can you please tell your travelling dates?

USER: My itinerary dates are 03/20 and 03/22.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you and have a nice day.