You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nancy Campbell.

ASSISTANT: How can I guide you at this moment?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you. Please give me a moment to check your reservation status.

USER: Ok, take your own time.

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

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for utilising our service.