You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be of your assistance?

USER: Can you help me change my existing reservation as my vacation got delayed?

ASSISTANT: Sure, may I know your good name?

USER: Scott Lopez is my name.

ASSISTANT: Sure, please give me some time I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there is no reservation found by this name.

USER: Thank you for the information.

ASSISTANT: Thanks for reaching us, have a nice day.