You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: The location of my interview was shifted last minute, can you please help me in modifying my existing reservation?

ASSISTANT: Sure, I will help you with that. Can you please provide your name to check your previous reservation?

USER: My name is Ruth Mitchell.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Sorry, I didn't find any reservation on your name in our database to change your reservation.

USER: That's ok, thank you for your fast service.

ASSISTANT: Thank you for reaching us, have a great day.