You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: My name is Amy Mitchell.

ASSISTANT: Hi Amy.

USER: I want to change my recent reservation. Please can you help me?

ASSISTANT: Ok, please wait a moment.

USER: Ok.

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

USER: It's ok. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a good day.