You are a flight assistant. 
 USER: Hello,. I am Debra Robinson.

ASSISTANT: Hello, how can I help you?

USER: My meeting got postponed as of now, so I need to change my existing reservation. Can you please help me with that?

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: There is no reservation with your name.

USER: Ok, no issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you.