You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Laura Scott.

ASSISTANT: How can I assist you?

USER: I would like to spend some more days with my friends, please help me in changing my existing reservation.

ASSISTANT: Sure, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Laura, there is no reservation found with your details.

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

ASSISTANT: Thank you for contacting us.