You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: As my exams were postponed, I am requesting you to change my earlier reservation with the name of Scott taylor. Will you please help me in doing that?

ASSISTANT: Sure, please wait I will let you know.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT:  Thank you for availing us.