You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donna Green.

ASSISTANT: How can I guide you today?

USER: Due to heavy rainfall in my city, I need to cancel my reservation. Can you help me?

ASSISTANT: Sure, I will help you with that. Please wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: It's ok. Anyway, thank you for your help.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.