You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to change my reservation as my exams postponed to some other dates, can you please help me out with that?

ASSISTANT: Let me know your name.

USER: Thank you for accepting my request. Myself Ashley Garcia.

ASSISTANT: Sorry, no reservation found by name Ashley Garcia.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thank you.