Hello.
user
Hello. How may I help you today?
assistant
I am Brian Jackson. I am planning to travel on these days that is on 07/22 and return on 07/24. Can you make a reservation for me?
user
Ok, please provide your airport codes too.
assistant
Sure, my airport codes are from DEN to AUS.
user
  Just give me a moment, I will check flight availability in this route.
assistant
Ok, make sure that the connection limit 1.
user
Sorry to inform you, there is no flight available on your route.
assistant
Ok, not a problem. Thank you for your information.
user
Welcome, have a good day.
assistant