You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Due to my health problem I want to change my reservation, can you please help me that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: My name is Samuel King.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your details, there is no reservation found in your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.