You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I address you?

USER: I am Alexander White. I want to change my reservation, help me with it..

ASSISTANT: Sure, I will help you with it.

USER: Sure.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for your patience. There was no reservation found on your name.

USER: Its ok, thank you for your help.

ASSISTANT: Thank you for reaching us.