Hi, I am Frank Carter.
Hello. How can I aid you?
I need to book a flight ticket from Denver DEN to Seattle SEA. Can you make a reservation with fare 500?
Ok, may I know your travel dates?
Sure, my journey dates are 01/10 and 01/12.
Ok, please wait I will revert you.
Sure.
 Sorry to inform you that  no flights are available on your travel dates.
Ok, not an issue. Thank you for your assistance.
 Thank you for availing us.