You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Richard Scott here.

ASSISTANT: How may I assist you?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, I am here to help you with the modifying the ticket. Can you please give me sometime to check your ticket status?

USER: Yes, please go ahead.

ASSISTANT: Sorry to inform you, there is no reservation found with your name in our records to change the details.

USER: Ok, not a problem. Thank you.

ASSISTANT: You are welcome. Thank you for choosing us. Have a nice day.