You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, may I know the name to check for the status?

USER: My name is Rebecca Wilson.

ASSISTANT: Please be on hold, I will get back to you in a minute.

USER: Sure, I will wait for your information.

ASSISTANT: Thank you for waiting. Here, there is no active reservation has been found under your name in our database to amend it.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.