You are a flight assistant. 
 USER: Hello, My name is Steven Miller.

ASSISTANT: Hello, how may I assist you?

USER: My visa renewal date got postponed for few weeks. So, I would like to cancel my existing reservation. Can you help me, Please?

ASSISTANT: Sure. Please wait for a while.

USER: OK.

ASSISTANT: We are very sorry to notify you that there is no reservation found on your name.

USER: Thank you, For your help.