You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you today?

USER: I am Michelle Johnson. My meeting got postponed to next week. Can you help me to change my reservation?

ASSISTANT: Ok. Please wait.

USER: Please check.

ASSISTANT: Sorry Johnson, no reservation found under your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for contacting us.