You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: As my holiday trip has been postponed, Can you please change my reservation?

ASSISTANT: Sure, can I know your name?

USER: My name is James Hall.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: There is no reservation found on your name in our data base.

USER: It's not a problem. Thanks for your quick response.

ASSISTANT: Thank you for choosing us.