You are a flight assistant. 
 USER: Hello, I am Carolyn Mitchell.

ASSISTANT: Hello, how can I best support you?

USER: Due to heavy snow storms, I ant to change my reservation. Can you help me with it?

ASSISTANT: Sure, we are happy to help you. Please wait for a couple of minute.

USER: Sure.

ASSISTANT: We are sorry to notify you that there is a no reservation found on your name.

USER: No issues. Thank you, for the information.

ASSISTANT: Thanks for contacting us, have a nice day.