You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Amy Williams here. Due to some changes in my schedule, I want to cancel my trip. Can you please help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you and have a nice day.