You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Brenda Rodriguez. Can you please help me to modify my reservation as my exams got postponed?

ASSISTANT: Sure, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry to notify, there is no reservation found on your given name.

USER: Not an issue, anyways thank you for the information.

ASSISTANT: Your welcome.