You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Shirley Allen. I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, please wait a minute.

USER: Thank you for accepting my request. I will wait for your response.

ASSISTANT: Sorry Allen, there is no reservation found under your name in our datebase.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Most welcome.