You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Emma Smith. My exams got postponed I need to change my existing reservation, can you help me for change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Thanks for your information.

ASSISTANT: Thank you have a nice day.