You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I render you?

USER: Due to an emergency, I want to change my reservation.

ASSISTANT: Ok.

USER: Can you help me?

ASSISTANT: Sure. May I know your name?

USER: Robert Hill here.

ASSISTANT: Please wait. Thanks for waiting, There is no reservation found on your name.

USER: No problem, Thank you.

ASSISTANT: Thanks for choosing us.