You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is  Donna Moore. Can you please book me a plane ticket from DEN to BOS? Sure, my trip dates are from 10/10 to 10/12.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight? Ok, please wait a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to say, no flights were available on your dates.

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

ASSISTANT: Thank you for reaching us, have a nice day.