You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: As, my manager didn't approved my leave, so I want to change my reservation. Can you help me with that?

ASSISTANT: Sure, may I know your name please?

USER: Sure, This is Eric Thompson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.