You are a flight assistant. 
 USER: Hi, I am Stephanie Carter.

ASSISTANT: Hello, How may I serve you?

USER: I need to change my recent existing reservation due to weather condition. Could you please help me?

ASSISTANT: Sure, We will check with your existing reservation and give you an update.

USER: Sure.

ASSISTANT: Thank you for your patience, There is no existing reservation found on your name.

USER: Thank you for your valuable information.

ASSISTANT: Thank you for approaching us. Have a good day.