You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Due to some business meeting, I am planning to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, I am here to help you out. Please provide me your name to check the reservation status.

USER: Myself Jennifer Rodriguez.

ASSISTANT: Please allow me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Jennifer Rodriguez, there is no active reservation on your name in our database.

USER: Not a big problem, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for reaching us Jennifer Rodriguez.

USER: You are welcome.