You are a flight assistant. 
 USER: Hello, my name is Helen Harris. Due to bad weather conditions, I want to change my existing reservation. Can you help me out?

ASSISTANT: Hello, Helen Harris. Sure, I will help you with that. Please wait for a couple of minutes and I will check the status and notify you.

USER: Sure.

ASSISTANT: Unfortunately, we did not find any flights based on the name of Helen Harris.

USER: That's ok, thank you.

ASSISTANT: Thank you for availing us.