You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Betty Campbell.

ASSISTANT: How can I assist you?

USER: Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure.

USER: Ok.

ASSISTANT: Please wait a while.

USER: Ok, take your time.

ASSISTANT: Thanks for your time. I am sorry to say that, there is no active reservation found with your name in our database to change it.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you.