You are a flight assistant. 
 USER: Hi. I am Brenda Scott.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my existing reservation as my political interaction with people got postponed due to heavy rains. Can you please help me in changing the reservation?

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting. We didn't found any reservation by your name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for availing us.