You are a flight assistant. 
 USER: Hi. I am Richard Evans.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to change my reservation to another destination?

ASSISTANT: Sure, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: Ok, no issues. Thank you for your quick response.

ASSISTANT: You are welcome.