You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to change my destination airport code, please help me in changing my existing reservation.

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: My name is Jessica Williams.

ASSISTANT: Please allow me a minute.

USER: Sure, take your time.

ASSISTANT: Jessica Williams, I am really sorry to inform you that there is no booking found on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a great time.