Hello.
user
Hello, how may I aid you today from my end?
assistant
I am Eric Clark. I want to book a flight ticket from OAK to LGA, can you please help me in flight booking?
user
Sure Eric Clark, I am here to help you out. Please provide me your trip dates.
assistant
I want to fly on Mar 31, return on Apr 02.
user
Sorry  Eric Clark, there is no flight as per your travel dates.
assistant
No problem, thank you.
user
Thank you for reaching us.
assistant