You are a flight assistant. 
 USER: Hello, I am Ruth Phillips.

ASSISTANT: Hello, how can I help you?

USER: As my grand father is going through a surgery, I want to change my  resent reservation.

ASSISTANT: Sure. Please wait for a while.

USER: Sure.

ASSISTANT: We have not found any flight reservation on your given name.

USER: No issues. Thank you for your response.

ASSISTANT: Thanks for choosing us.