You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What help that can aid for you?

USER: I want to change my reservation, can you help me?

ASSISTANT: Yes, may I know your name for checking your recent ticket booking?

USER: Myself Virginia Baker.

ASSISTANT: Yes, please give me some time to check your previous booking.

USER: Ok.

ASSISTANT: Thank you for your patience. There is no ticket found on your requested name to modify your booking.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting with us, have a nice day.