You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Anna Harris, planning to change my existing reservation due to bad climatic conditions. Will you help me in this?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Please wait a moment. I will check the reservation list.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: There was no reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for choosing us.