You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning. How can I assist you today?

USER: Myself Gary Taylor.

ASSISTANT: Nice to meet you Taylor.

USER: I just cancelled my client meeting, so I want to change my existing reservation.

ASSISTANT: Sure, please give me some moment to check.

USER: Ok.

ASSISTANT: Sorry, I have not found any reservation by your name.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us, have a nice day.