You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Rebecca Garcia, I need to change my existing reservation, can you please help me today?

ASSISTANT: I will help you with this, please wait a moment.

USER: Take your time.

ASSISTANT: Sorry Garcia, there is no reservation found on your name.

USER: Thank you for helping me.

ASSISTANT: Thank you for approaching us.