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

ASSISTANT: Hello, how may I serve you?

USER: Could you please help me to change an existing reservation due to my health issues?

ASSISTANT: Sure. Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us.