Hi.
Hello, How can I serve you?
Can you please book a flight ticket for me?
Sure, Can you please provide me with your journey details?
My journey details are  from Denver,CO-DEN to Charlotte,NC-CLT. My travelling  dates are Aug 21 and return on Aug 23. Can you please check whether the flight is available or not?
OK, Give me a minute I will check the availability and let you know.
OK.
Thanks for your patience.
It's OK.
We are sorry to say this we did not find any flights as per your requirements. May I know your name please?
Thank you. I am Amy collins.
Thank you have a nice day.