You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Pamela Evans planning to visit Space Center Houston on this vacation, can you book a ticket from DEN to IAH?

ASSISTANT: Ok, please help me out with your travelling days?

USER: Sure, my travel dates are 01/22 and 01/24. Please check for the flight with connection 1 and price limit 500.

ASSISTANT: Sorry, no flights are available on your requested dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for availing us, have a good day.