Hello. Myself Kevin Baker.
user
Hello, how may I help you?
assistant
Can you help me to book a flight ticket from DCA to New York, JFK?
user
Sure, could you please provide your travelling dates to search for the flight?
assistant
Ok, please book for the dates Dec 21 and Dec 2. My return date is Dec 23.
user
Sorry to say, no flight is available for you.
assistant
That is ok, thank you for assisting me.
user
Welcome.
assistant