You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Barbara Adams.

ASSISTANT: Nice to meet you.

USER: I want to change my reservation, due to heavy rainfall in New York, can you help me in change the reservation?

ASSISTANT: Please give me a moment. There is no reservation found under your name.

USER: Sure. That's ok, thank you for your information.

ASSISTANT: Welcome, have a great day.