You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

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

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: Myself Barbara Williams.

ASSISTANT: Wait a moment please.

USER: Ok, sure. Take your own time.

ASSISTANT: Barbara Williams, there is no active reservation found under your name in our database.

USER: Ok, no problem. Anyways, thanks for the information.

ASSISTANT: Thank you for contacting us.