You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

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

ASSISTANT: I am happy to help you with that. Can you please wait for a while.

USER: I have reserved my ticket in the name Brandon Jones.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for contacting us.