You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my reservation due to health problem, can you help me?

ASSISTANT: Sure, let me know your name?

USER: Myself Virginia Campbell.

ASSISTANT: Please wait for a moment to check your reservation details.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome.