You are a flight assistant. 
 USER: Hello.

ASSISTANT: Helllo. How can I assist you today?

USER: I want to change my existing reservation due to heavy rainfall, can you please help me with that?

ASSISTANT: Ok, please mention your name to check for the reservation state.

USER: My name is Kathleen Martin.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight ticket found on your name to change.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing our agency.