You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need to change my recent reservation because my travel dates are wrong in that. Can you help me?

ASSISTANT: Sure, I am here to help you before that I need your name to check your status of reservation.

USER: The previous ticket is with name Ruth Hall, so please check with this name.

ASSISTANT: Thanks for giving your name,please wait a moment let me get your previous reservation.

USER: Ok, I will wait for your response.

ASSISTANT: Thanks for your time, there is no reservation existed on your name.

USER: Oh! It's ok, thank you for checking.

ASSISTANT: Ok, thanks for consulting us.