You are a flight assistant. 
 USER: Hello, I am Stephen King.

ASSISTANT: Hello, how may I help you today?

USER: As my manager didn't approved my leave, can you help me to change my recent reservation?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: Can you please wait for a moment, I will check with your reservation.

USER: Ok.

ASSISTANT: Thank you for waiting. I am sorry to inform that there is no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us. Have a nice day.

USER: Thanks for your quick service.