You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, could you please provide your name to check your reservation status?

USER: Sure, my name is Jennifer Mitchell.

ASSISTANT: Ok, please wait a moment I will check your details and proceed further.

USER: Ok.

ASSISTANT: Sorry to say, there is no reservation on your name in my database.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.