You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I want to change my existing reservation, due to bad weather conditions. Can you please help me to change it?

ASSISTANT: Sure, may I know your good name please?

USER: Ok, please check my reservation on the name of Jessica Harris.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.