You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Can you aid me to change my reservation due to bad weather conditions?

ASSISTANT: Sure, I will help you with that.

USER: Dennis Harris here.

ASSISTANT: Please wait for a while, I will get back to you.

USER: Ok.

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

USER: It's not a big deal.

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

USER: Thank you.