You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Jonathan Thomas. I would like to change my recent reservation, can you help me with this?

ASSISTANT: Sure Thomas, I am here to help you. Let me check your reservation status in our database.

USER: Thank you. Sure, take your own time.

ASSISTANT: Thomas sorry for inconvenience, no reservation is found on your name in our database.

USER: That's fine, thanks for your information.

ASSISTANT: You are welcome.