You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am planning to change an existing reservation, due to bad weather condition. Can you please help me out?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: Thank you.

ASSISTANT: You are welcome.

USER: I am Nancy Evans.

ASSISTANT: Thank you. Please allow me a minute.

USER: Sure.

ASSISTANT: Nancy Evans, I am sorry to inform you that there is no booking found on your name.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you for reaching us. Have a great time!.