You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How best can I assist you the day?

USER: I want to change my existing reservation as I want to stay some more days in my home. Can you do a favour for this?

ASSISTANT: Sure, I will help you with that. On what name, do I need to check the reservation?

USER: Ok, please do check the reservation with the name Kathleen Rodriguez.

ASSISTANT: Ok, please be on hold.

USER: OK.

ASSISTANT: We regret that, we did not find any reservation on your name to change it.

USER: Ok, no problem.

ASSISTANT: Thanks for opting us.

USER: Thanks for the information.

ASSISTANT: Have a great day!.