You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Ruth Gonzalez. I have to change my flight ticket booking that I am unable to attend the trip, can you please help me in flight ticket modification?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Ruth, there is no reservation found with your name in our records.

USER: No problem, thank you for your information.

ASSISTANT: Most welcome.