You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am having sudden meeting in my office, can you please help me changing my reservation?

ASSISTANT: Sure, I will do that for you. For checking your reservation status, may I know your name?

USER: Ok, my name is Linda Phillips.

ASSISTANT: Sorry Linda, I have not found any reservation by your name in our database.

USER: Ok, not an issues. Thank you for your help.

ASSISTANT: You are welcome and thank you for choosing us.