You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Amanda Robinson. Can you please book me a flight ticket from JFK to DEN?

ASSISTANT: Can you please tell your travelling dates?

USER: Sure, my trip dates are from 06/30 to 07/02.

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

USER: That's ok, thank you for the information.

ASSISTANT: Thank you and have a nice day.