You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Michelle Robinson. I want to change an existing reservation due to sudden change in my trip. Can you help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Wait for some time.

USER: oK.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: No issue. Thank you.

ASSISTANT: Thanks for approaching us.