You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Evening. How may I aid you?

USER: Please see if there is any possibility to change my dates of travel, as my exams got postponed, I could not travel on those dates.

ASSISTANT: Sure, can I know your name for checking?

USER: My name is Joseph Johnson.

ASSISTANT: Please hold on for a moment, let me check.

USER: Ok, take your time.

ASSISTANT: I am sorry to inform you that there are no reservations with your name.

USER: No problem, I will find other means of travel to reach my destination.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your information.