Hello, how may I serve you?
assistant
Hello, I am Margaret White. I got an invitation to attend Film fare awards, so I need to book a ticket to Washington, DC-DCA on 10/22, can you help me with it?
user
Yes, I will.  Please provide your other details.
assistant
My origin is from Washington, DC-IAD and return on 10/24.
user
Sorry, there is no flight available on your name. Thanks for connecting with us.
assistant
Ok, no issues. Thank you.
user