You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I need to buy a plane ticket from CLT  to IAH. Can you help me?

ASSISTANT: Sure, may I know your trip dates?

USER: I am planning to start on Sept 21 and return on Sept 23.

ASSISTANT: Can you please mention your name?

USER: I am Catherine Anderson.

ASSISTANT: Do you have any other requirements?

USER: I need 1 stop over.

ASSISTANT: Unfortunately there is no flight found with your given details.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you for availing us.