You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Eric Anderson here.

ASSISTANT: How may I assist you?

USER: I want to change my existing reservation, due to some health issues. Can you please help me with it?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check the status of your reservation.

USER: Ok, sure. I will be waiting for your response.

ASSISTANT: Eric Anderson, no reservation has been found on your name in our database.

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

ASSISTANT: Thank you for reaching us.