You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Due to bad weather conditions, can you help me to change my existing reservation?

ASSISTANT: Sure, I am here to help you. Can you please let me know your name to proceed?

USER: Sure, my name is Gregory Turner.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us, have a good day.