You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Raymond White from Houston. I want to change my travel dates in my previous reservation. Can you please help me with that?

ASSISTANT: Ok, please wait a moment.

USER: Ok, thank you for your positive response.

ASSISTANT: There is no flight ticket been booked on your name as per our reservation records.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for connecting with our agency.

USER: Thank you for your information.