You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What can I do for you?

USER: My name is Joshua Hall. I want to change my reservation due to cyclone in my region.

ASSISTANT: Sure Hall, please wait for a minute.

USER: Ok, take your own time.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database, I think your previous reservation is not done before.

USER: Not an issue, thank you for assisting me.

ASSISTANT: Do you need any other help?

USER: No, thank you for your services.

ASSISTANT: Ok, thank you for approaching us.