You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, I will assist you in this.

USER: Thank you.

ASSISTANT: May I know your name to check the reservation list?

USER: Sure, Cynthia Johnson here.

ASSISTANT: Please standby.

USER: Sure, take your time.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name to make changes further.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us. Hope to serve you again.