You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, will you mention the name for checking the reservation?

USER: I have reserved my flight ticket in name Eric Lee.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Ok, fine. Thank you for checking.

ASSISTANT: Welcome, have a great day.