You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Myself Joshua Clark.

ASSISTANT: Ok.

USER: For some personal issues I want to change my reservation. Can you please help me?

ASSISTANT: Sure, I can help you with that. Please allow me a moment to check the details for you. Joshua, I see that there is no reservation found under your name.

USER: It's ok. Thank you for the information.

ASSISTANT: You are welcome.