You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: I am Christine Edwards. I want to change my recent reservation as my exam got rescheduled. Please help me out.

ASSISTANT: Sure, I am here to help you. Give me a minute.

USER: Ok.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: No problem, thank you.

ASSISTANT: Thank you for approaching us.