You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change my reservation as I have some health issues, so please help me in this.

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: Kindly mention your name to proceed further?

USER: Sure, Stephanie Thompson is my name.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, sorry, no reservation found on your name.

USER: Not an issue, thanks for your support.

ASSISTANT: Thank you for approaching us.