You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: Due to some E commerce network meeting, I am going to change my reservation. Can you please help me for this?

ASSISTANT: Sure, I will help you with that. Can I have your good name please?

USER: Myself Samantha wright.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Samantha wright, no reservation has found under your name to change.

USER: Not a big deal, anyhow thank you very much for your service.

ASSISTANT: Thank you for choosing us, have a good day.