Hi.
user
Hello, how can I help you?
assistant
 I want to book a flight ticket for my two days trip from 03/09 to 03/11, can you help me?
user
May I know your desired airport codes please?
assistant
Ok, my source and destination airport codes are DTW to DEN.
user
Please wait a while.
assistant
Ok, take your time.
user
May I know your name please?
assistant
My name is Samuel Miller.
user
Sorry to say, there is no flight on your desired travel dates.
assistant
Ok, no problem.
user
Thank you for opting us.
assistant
Thank you for your response.
user