You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Yes, I will help you with that. Can you please let me know your full name?

USER: Jason Wright here.

ASSISTANT: Ok, can I put the conversation on hold for a while?

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no active reservation found with your name in our portal.

USER: No issues, thank you.

ASSISTANT: You are welcome. Thank you for opting us.