You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Can you please change my reservation, due to some health issues?

ASSISTANT: Sure, may I know your good name?

USER: My name is John Hernandez.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found on your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.