You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Elizabeth Thompson, can you please help me to modify my reservation as my exams got postponed?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry Elizabeth Thompson, no reservation has found under your name to change.

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

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