You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: 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?

ASSISTANT: Ok, please provide your airport codes too.

USER: Sure, my airport codes are from DEN to AUS.

ASSISTANT:   Just give me a moment, I will check flight availability in this route.

USER: Ok, make sure that the connection limit 1.

ASSISTANT: Sorry to inform you, there is no flight available on your route.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Welcome, have a good day.