Hello.
user
Hello, how may I assist you?
assistant
I am Michael Nelson. I want to book a flight ticket to attend a sports live event in Oakland, so please help me in booking a flight ticket from Washington.
user
Sure, may I know your travelling dates?
assistant
I want to fly on 02/01 and return on 02/03.
user
Can I know your journey codes?
assistant
My airport codes are DC - IAD, CA - OAK.
user
Please give me a minute.
assistant
Sure.
user
There is no flight found matching  with your requirements.
assistant
Not an issue. Thank you.
user
Thanks for reaching us.
assistant