You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I'm Brandon Rodriguez. My scheduled examination dates has been postponed. So, I would like to change my reservation which is under my name.

ASSISTANT: Sure, I will help you with that. Please wait for a while.

USER: Sure, take your time.

ASSISTANT: I am sorry to infirm that there is no reservation found under your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.