You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what services are you seeking from us?

USER: I want to change my existing reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: Sure, my name is Justin Rodriguez.

ASSISTANT:  Thank you. Please stay online for a while, I will check your reservation status and let you know.

USER: Sure, I will wait.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: Ok, no problem. Anyways, thank you.

ASSISTANT: Thank you for reaching us.