You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, can I know your name?

USER: My name is Kimberly Davis.

ASSISTANT: Ok, please wait for sometime.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.