You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua Davis.

ASSISTANT: How may I serve you?

USER: My meeting got postponed as of now, so I need to change my existing reservation. Can you please help me?

ASSISTANT: Sure, please be on hold.

USER: Ok.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.