You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: I am here to help you in changing your reservation. Can you please provide your name for checking the reservation status?

USER: Sure, my name is Brenda Mitchell.

ASSISTANT: Please be on hold for sometime to check the active reservation with your name.

USER: Sure, take your time.

ASSISTANT: Sorry for the trouble which is caused to you, I have not found any reservation on your name in our database.

USER: Ok, no issues, Thank you for checking.

ASSISTANT: You are welcome, thank you for reaching us. Hope you have a nice day ahead.