Hello, Mary Mitchell here.
user
Hello. How can  I assist you?
assistant
I am an doctor. I need to attend an emergency operation in CLT. Please book a flight ticket from BOS.
user
Yes, can you share me your travelling dates?
assistant
August 6 and 8 are my planned travelling dates.
user
Do you have any other preferences?
assistant
I need to fly in a normal-cost airlines.
user
Give me a moment.
assistant
Please make sure that the flight departs in the evening.
user
Ok. Sorry to inform you that there are no flights found on your requested dates.
assistant
That's ok. Thank you.
user
Thank you for contacting us.
assistant