You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

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

ASSISTANT: Sure, please let me know your name.

USER: My name is Linda Turner.

ASSISTANT: Ok, please wait.

USER: Sure.

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

USER: Ok, not a problem. Thank you for informing me.

ASSISTANT: Thank you for choosing us.