Hello, Larry Hernandez here.
user
Hello. How can I help you out?
assistant
Can you help me for booking a flight ticket?
user
 Sure, Could you please send me your travelling details?
assistant
Sure, I would like to travel from Charlotte, NC - CLT on Nov 20 to Washington, DC - DCA on Nov 22.
user
Please wait a while I will get back to you.
assistant
OK.
user
Thanks for being patient. According to your request there are no flights available for you.
assistant
OK, no issue.
user
Thank you for contacting us.
assistant
Thanks for your information.
user