You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: As my friend booked my ticket previously with wrong source code. So, I want to change my existing reservation. Can you help me out in changing my reservation?

ASSISTANT: Sure, Can I have your name please?

USER: I am Mary Wright.

ASSISTANT: Please give me a minute, I will check with the current status of your reservation and let you know.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: Ok. Thank you for rechecking my reservation.

ASSISTANT: Have a nice day.