You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to change my existing reservation, as my exams got post postponed. Can you please help me out with it?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for the response.

ASSISTANT: May I know your name please to check your reservation status?

USER: Sure, my name is Richard Garcia.

ASSISTANT: Please hold on a moment.

USER: Ok, sure.

ASSISTANT: Richard Garcia, no reservation has been found on your name in our records.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.