You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Due to bad weather conditions, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, I will help you out. May I know your name please?

USER: Sure, my name is Jacob Baker.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry there are no reservations found.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing our services.