You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I would like to change my reservation due to some health issues, can you please help me out with that?

ASSISTANT: Sure, I am here to help you in changing.

USER: Thank you.

ASSISTANT: Please, forward me your name to check your reservation status.

USER: Myself Carolyn Wright.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure, I will wait for your response.

ASSISTANT: We regret to inform you that, we have not found any active reservation on your name in our database.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for reaching us.