You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Here Ronald Williams.

ASSISTANT: How may I help you?

USER: I have to change my flight ticket due to some issues in my office, so can you help me in flight ticket odification?

ASSISTANT: Sure, please wait a minute. I will check your ticket status and let you know.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to inform you, there is no reservation found with your name in our database to modify.

USER: Ok, that's fine. Thank you for your valuable information and quick response.

ASSISTANT: You are most welcome, thank you for reaching us.