Hello.
user
Hello. What service do you need from us?
assistant
I am Donald Moore. I would like to book a ticket to Houston, can you please help me out?
user
Sure, I am here to help you. Will you please share your travel dates?
assistant
I am travelling on these dates 07/13 and 07/15.
user
What airport codes do you prefer  to travel?
assistant
I am flying from LAS to HOU.
user
Sorry to inform you, there is no flight found in this route.
assistant
Ok no problem, thank you for your services.
user
You are welcome. Thank you for reaching us.
assistant