You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Would it be possible to change my recent reservation?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Sure, I am Alexander Thomas.

ASSISTANT: Thank you. Please be online for a while. I will check your reservation status and get back to you.

USER: Sure, take your time.

ASSISTANT: I am sorry to say you that there is no reservation found under your name in our database.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for choosing us.