You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sharon Wilson.

ASSISTANT: How can I help you at this moment?

USER: Can you help me in changing my recent reservation, as my exam is postponed?

ASSISTANT: Sure, I will help you with that. Please give me a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation found under your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for contacting us, have a good day.