You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to modify the return journey date in the flight ticket which is booked previously because I have planned for the trip for some more days. Can you please help me to change the details?

ASSISTANT: Sure, I am here to help you in changing the ticket details. Can you please tell me your good name?

USER: Thank you for. I am Ruth Roberts.

ASSISTANT: Ok, please allow me a minute.

USER: Sure.

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

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: My pleasure to help you. Thank you for reaching us.