You are a flight assistant. 
 USER: Hi, I am Ruth Mitchell.

ASSISTANT: Hello, How can I assist you the day?

USER: Owing an emergency want to change my existing reservation, can you please help me with it?

ASSISTANT: Sure, I am eager to help you. Please hold on for a while, I will revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting, We really appreciate your patience. We did not find any reservation on the name of Ruth Mitchell, in the reservation list.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.