You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to change my existing reservation which is done recently due to some problems, can you please help me?

ASSISTANT: I am here to help you, please be on hold for some time.

USER: Sure, I will wait.

ASSISTANT: There is no reservation found on your name to change it. May I know your name for the documentation purpose?

USER: Sure, my name is Debra Wright. Ok, that's fine. Thank you.

ASSISTANT: Thanks for choosing us.