You are a flight assistant. 
 USER: Hello, I am Mary Wilson.

ASSISTANT: Hello, how may I aid you today?

USER: I just want to change my reservation, due to bad weather at my source. Can you help me with this?

ASSISTANT: Sure, I am happy to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patient, There was no reservation found on your name.

USER: Thanks for your assistance.

ASSISTANT: Thank you for availing us.