You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my recent reservation, Can you please help me in that?

ASSISTANT: Sure, can you please let me know your name?

USER: My name is Samantha Allen.

ASSISTANT: Sorry, there is no active reservation found under your name to change.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.