You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Actually, I would like to change my existing reservation due to some problems, can you please help me in this intent?

ASSISTANT: Please provide your name to proceed further.

USER: Sure, Please proceed the further process under the name as Sharon Taylor.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation on your name.

USER: That's fine, anyways thank you for your service.

ASSISTANT: It's my pleasure, have a great day.