You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Actually, I want to change my reservation which is done recently due to some health issues, can you please help me out?

ASSISTANT: I would be happy to help you with that.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: May I know your name please?

USER: Sure, my name is Amanda Gonzalez.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.