You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, I am here to help you with your concern. Can you please provide your name to check the status of your reservation?

USER: Thank you very much for quick access, myself Patricia Turner.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your kind response.

ASSISTANT: Patricia Turner, no reservation has been found on your name in our records.

USER: Not a big issue, anyhow thank you very much for your service.

ASSISTANT: Thank you for approaching us.