You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my reservation on the name of Barbara Jones. Will you help me?

ASSISTANT: Sure, I am pleased to help you. Wait a minute please I will get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, sorry no reservation found with your name.

USER: No problem, thanks for your support.

ASSISTANT: Thank you for reaching us, have a nice day.