You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to change my recent reservation due to my exams, can you help me?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: I am Shirley Lee.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Shirley Lee, there is no active reservation found under your name to do changes in that.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.