You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am Jennifer Anderson, can you please serve me by modification of my reservation as my exams got postponed to some other day?

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Thank you for considering my request, sure I will wait for your response.

ASSISTANT: Sorry Anderson. There is no reservation existing on your name.

USER: Not an issue with that, it might not be cancelled by my mother but she did not informed me yet. Anyways thank you for the information.

ASSISTANT: You are welcome, have a nice day.