You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you help me with making few changes in my existing reservation I made a week ago?

ASSISTANT: Sure, may I know your name to check for the previous reservation in our data base?

USER: Myself Virginia Collins.

ASSISTANT: Please allow me a moment to check for the previous reservation.

USER: Sure.

ASSISTANT: I appreciate your patience. Virginia, there is no reservation found under your name.

USER: Oh! that's sad, anyways thank you for checking.

ASSISTANT: You are welcome. Thank you for contacting us.

USER: Thank you for quick response.

ASSISTANT: You are welcome.