Hello.
user
How could I assist you today?
assistant
Could you please book me a flight ticket from IAD to DFW?
user
Sure, to book a ticket may I know when you are willing to depart and arrive?
assistant
I will start on Apr 19th and return on Apr 21st.
user
Can you please mention your name?
assistant
I am Alexander Brown.
user
Please provide your specifications.
assistant
I need 1 lay by.
user
Unfortunately there is no flight available on your route according to your given information.
assistant
That's alright, thanks for your assistance.
user
Thank you.
assistant