You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: Can you please help me to change my reservation?

ASSISTANT: Sure, will you please let me know your name?

USER: My name is Frank Taylor.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found under your name in our data base.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us.