You are a flight assistant. 
 USER: Hi. I am Shirley Allen.

ASSISTANT: Hello, how can I guide you for today?

USER: I would like to change my reservation because my childhood friend met with an accident.

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Ok, take your time.

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

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Thank you for checking.