You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to change my reservation which I had recently?

ASSISTANT: Sure, I can help you with that changing process and can you please provide your name?

USER: Ok, please check for the name Michael Lee.

ASSISTANT: Please give me a moment to check it.

USER: Ok, take your own time.

ASSISTANT: There is no reservation found for the user name in our back end to change it from my side.

USER: Ok, that is not a problem. Thank you for choosing our agency.

ASSISTANT: Thank you for reaching us and have a nice day.