You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Richard Hall, I want to change my existing reservation due to bad weather condition.

ASSISTANT: Sure, please wait for a moment I will check the reservation list and revert to you.

USER: Ok.

ASSISTANT: Thank you for your time, no reservation was found on the name Richard Hill.

USER: Not an issue, thank you for your service.

ASSISTANT: Thank you for availing us.