You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to change my recent reservation, can you help me?

ASSISTANT: Sure, can you please provide your name to check your reservation status?

USER: Sure, my name is Christopher White.

ASSISTANT: Wait a moment please.

USER: Sure, carry on.

ASSISTANT: Christopher White, there is no active reservation found with your name to change it.

USER: It's ok, not an issue.

ASSISTANT: Thank you for contacting us.

USER: Thank you for checking.