You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: May I know your name?

USER: I am Brian Smith.

ASSISTANT: Ok, wait for some time I will check the reservations on your name and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: Ok, not a problem. Thank you for the information.

ASSISTANT: Thanks for approaching us.