You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Matthew Clark.

ASSISTANT: How can I assist you?

USER: Can you please change my reservation, due to bad weather conditions?

ASSISTANT: I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no active reservation found on your name to change.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.