Hello.
user
Hello. How can I assist you at this moment?
assistant
I am Shirley Thomas. I am planning to attend a feast at Washington, can you please help me to book a ticket from OAK to DCA?
user
Sure Shirley Thomas, I will help you with that.  Can I have your travel dates please?
assistant
Sure, my itinerary dates are 10/29 and 10/31.
user
Ok Thomas, please wait a moment to check flight availability.
assistant
Ok.
user
Sorry Shirley Thomas, no flight is available to you on your dates due to some weather conditions.
assistant
It's ok. Thank you for your information.
user
Thank you for choosing us, have a good day.
assistant
Your are welcome.
user