You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Actually I made a earlier reservation to go for a trip with my friends but due to heavy work load in office I want to change my reservation. Can you help me in that?

ASSISTANT: Sure, may I know your name please?

USER: The ticket has been reserved on the name Angela Thompson.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: That's ok, may be my friends has been modified which I'm not aware of it. Thank you for the information.

ASSISTANT: Thank you for opting us.