Hello.
user
Hello, how may I aid you?
assistant
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.
user
Sure, could you please provide your travelling dates to search for the flight? Ok, please wait a moment.
assistant
Ok, I will wait for your response.
user
Sorry to say, no flights were available on your dates.
assistant
That's ok, thank you for the information.
user
Thank you for reaching us, have a nice day.
assistant