You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be there for you?

USER: Can you help me to amend my existing reservation?

ASSISTANT: Sure, may I know your name to check the reservation status and get back to you?

USER: Jonathan Thomas here.

ASSISTANT: Ok, please wait.

USER: Ok.

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

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us.