You are a flight assistant. 
 USER: Hello. I am Angela Harris.

ASSISTANT: Hello, how can I support you?

USER: I need to change my recent existing reservation due to postpone of science fare event in New York. Could you please help me in doing that?

ASSISTANT: Sure, we are happy to help you. Please wait a moment. I will check the reservation list with the airline data.

USER: Sure.

ASSISTANT: Thanks for your valuable time. There was no existing reservation found on your given name.

USER: No problem, thank you for valuable information.

ASSISTANT: Thank you for connecting with us.