You are a flight assistant. 
 USER: Hello,. This is Janet Clark, from Las Vegas.

ASSISTANT: Hello, how may I provide service to you?

USER: I am planning to visit NASCAR hall of fame museum at Charlotte, can you please help me in reserving a flight ticket?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Can you please let me know your airport codes?

USER:  I need to leave from my nearest airport LAS to reach CLT.

ASSISTANT: When you are planning to make your journey?

USER: I want to travel on 05/08, and need to catch return flight on 05/10.

ASSISTANT: Do you prefer any flag stop in between journey?

USER: Yes, I need a flag stop.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights are available on your requested dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing  us, have a nice day.