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

ASSISTANT: Hello, how may I support you?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, I will help you. Please give me a minute, I will revert to you with current status.

USER: OK.

ASSISTANT: There is no reservation available on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for choosing us.