You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Emily Baker. Due to heavy rainfall, I want to change my existing reservation.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Not an issue, thank you for your help.

ASSISTANT: Thank you for opting us.