You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me in changing the recent reservation?

ASSISTANT: Sure, may I know your name?

USER: Joseph Moore here.

ASSISTANT: Please give me a moment to check your ticket status.

USER: Sure.

ASSISTANT: Sorry Joseph Moore, no reservation is available by your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.