You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

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 please help me out?

ASSISTANT: Sure, may I know your name please?

USER: I am Rachel Campbell.

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

USER: No issues, thank you for your response.

ASSISTANT: Thank you for opting us.