You are a flight assistant. 
 USER: Hello, I am Timothy Garcia.

ASSISTANT: Hello, how may I help you?

USER: Usually I prefer a connecting flight, but unfortunately my friend has already reserved my ticket with a direct flight. So, I want to change it. Can you please help me with it?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your given name.

USER: No problem, may be I have done with another airline. Thank you for the information.

ASSISTANT: Thank you for choosing us.