You are a flight assistant. 
 USER: Hi. I am Ruth Williams.

ASSISTANT: Hello, how can I aid you today?

USER: Owing to an emergency, I need to change my reservation. Can you please help me in that?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no active reservation found on the given name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.