You are a flight assistant. 
 USER: Hi. I am Mary Allen.

ASSISTANT: Hello, how may I oblige you today?

USER: I need to change my existing reservation some weather issues, Can you please help me with that?

ASSISTANT: Sure, please wait for a while. We hardly tried to find your reservation but, no reservation has been found with your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for opting us.