You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Rebecca Miller.

ASSISTANT: How can I help you today?

USER: I need to amend my reservation due to some issues, can you help me out?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Sorry to inform this, there is no reservation on your name in our database.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.