You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to change my recent reservation due to postpone of my exams, can you help me in doing that?

ASSISTANT: Please share your name to proceed further?

USER: I am Jerry Taylor.

ASSISTANT: There is no active reservation found under your name to amend it.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.