You are a flight assistant. 
 USER: Hello. I am Angela Thompson.

ASSISTANT: Hello, how may I aid you?

USER: I want to change my existing reservation due to heavy rainfall, can you please help me?

ASSISTANT: Sure, I can help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: Ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for choosing us.