You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jerry Smith here.

ASSISTANT: How can I aid you today?

USER: I need to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, let me check your reservation status in our database.

USER: Thank you for considering my request.

ASSISTANT: I did not find any reservation in our database.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your hep in  searching.