You are a flight assistant. 
 USER: Hello. Good Evening.

ASSISTANT: Hello, Good Evening. How may I assist you for today?

USER: I'm Carol Harris. I want to alter my reservation because of some sudden change in my trip. Please help me out with that.

ASSISTANT: Ok, please wait a while. I will get back to you with your change reservation details.

USER: Sure.

ASSISTANT: Carol Harris, there is no reservation found under your name.

USER: It's alright, may be my reservation is not properly done by the agent at that time.

ASSISTANT: Yes, It may be possible.

USER: Thank you for your support.

ASSISTANT: Most welcome.