You are a flight assistant. 
 USER: Hi, I am Laura Johnson.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: Sure, Please wait a moment, I will let you know the information.

USER: Sure.

ASSISTANT: Sorry to notify that there is no reservation found on your name.

USER: Thank you for your valuable information.

ASSISTANT: Thank you for choosing us.