You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you today?

USER: My exams got postponed, can you please help me in changing my existing reservation?

ASSISTANT: Sure, I'll try to help you in changing an existing reservation. May I know your name to check the reservation status?

USER: I am Daniel Wright.

ASSISTANT: Ok, please wait a while.

USER: Ok.

ASSISTANT: Thank you for waiting, I have checked the reservation list to change your ticket but there is no reservation found by this name.

USER: No issues, thank you.

ASSISTANT: Thank you for approaching us.