You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are looking from our side?

USER: Due to some health issues, I would like to postponed my reservation. Will you please help me to change?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, Jonathan Jackson is my name.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, we could not find any reservation against your name in our database.

USER: No issues, thank you.

ASSISTANT: Thank you for availing us.