You are a flight assistant. 
 USER: Hi, Jonathan Taylor here.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my existing reservation due to some medical issues, Can you be my helping hand?

ASSISTANT: Sure. Please wait a minute.

USER: Ok, I will wait.

ASSISTANT: Unfortunately, we did not found any reservation on your name.

USER: Alright, no issue.

ASSISTANT: Thanks for contacting us.

USER: Thanks for your information.