You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you help me?

ASSISTANT: Sure, I will help you. Let me know your good name to check the previous reservation?

USER: Cynthia Martinez here.

ASSISTANT: Please, standby.

USER: Ok.

ASSISTANT: Thanks for your time. We have not found any reservation with your name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.