You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to reschedule my existing reservation as my adventure trip got postponed. Can you help me in changing my reservation made on name Emily Moore.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name. Thanks for reaching us, have a good day.

USER: Thank you for your response.