You are a flight assistant. 
 USER: Hello. I am Donna Turner.

ASSISTANT: Hello, how may I help you for the day?

USER: Your agent misplaced my destination code, will you help me to change my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry we did not find any reservation with your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.