You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Dorothy Taylor.

ASSISTANT: Ok.

USER: I need few changes in my recent reservation due to venue changed. Can you change my reservation?

ASSISTANT: Sure, please stand by.

USER: OK.

ASSISTANT: Thank you for waiting. Sorry to say no reservation found on your name.

USER: Ok, not a problem.

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

USER: Thanks for the information.