You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My exams are postponed and I want to change my reservation, can you help me?

ASSISTANT: Ok, I will help you out in changing your reservation. Can you please provide your name?

USER: I am Jeffrey Carter.

ASSISTANT: Ok Jeffrey, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for your patience. Sorry, there are no reservations found with this name?

USER: No problem, thanks for checking.

ASSISTANT: Most welcome.