You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I just want to change my existing reservation, due to heavy rainfall at my destination. Can you please help me?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Emily Rodriguez.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's Ok, thanks for your service.

ASSISTANT: Thank you for reaching us.