You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Dennis Wright here, I want to book a flight on the route from DEN-OAK, can you assist with it?

ASSISTANT: Sure, what dates you are willing to travel?

USER: I will be travelling from 08/13 to 08/15.

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

USER: Ok, no issues.

ASSISTANT: Thank you, have a nice day.

USER: Thank you for checking.