You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Joseph Harris.

ASSISTANT: How can I help you?

USER: I want to change my recent reservation. Due to some issues, could you please help me to change my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Ok, I will wait for your response.

ASSISTANT: I could not find any active reservation under your name in our database.

USER: Not an issue, I will choose other way to reach my destination.

ASSISTANT: Thank you for reaching us.

USER: Thank you very much for checking my status.