You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you please aid me in changing my existing reservation?

ASSISTANT: Sure, on whose name you did the reservation let me know?

USER: Michael Perez.

ASSISTANT: Kindly, Wait a while.

USER: Sure.

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

USER: No issues, thank you for your information.

ASSISTANT: Thank you for reaching us. Have a nice day.