Hi, I am Andrew Hernandez.
user
Hello, how may I help you today?
assistant
As I am planning to meet my uncle at Las Vegas on his birthday, so can you please help me in booking flight  ticket on dates 07/30 and 08/01?
user
Sure, can I know your airport codes?
assistant
Yes, my airport codes are Washington, DC-IAD and NV-LAS.
user
Do you have any preferences?
assistant
Yes, I need a connecting flight.
user
Wait a minute.
assistant
Ok.
user
Sorry, currently there are no flight on your travelling dates.
assistant
That's ok, thank you for the response.
user
Thank you for reaching us.
assistant