You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: My exams got postponed, can you please help me in changing the reservation?

ASSISTANT: Sure, I am here to help you. Can I know your name please?

USER: I am Brenda Garcia.

ASSISTANT: Ok, please stand by.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us, have a good day.