You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I would like to meet my friends at Detroit, but due to the inconvenience of dates i want to change my existing reservation. Can you please help me in this cancellation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute, I will get back to you.

USER: Ok, I will wait for your response.

ASSISTANT: May I know your name please?

USER: Myself  Kimberly Anderson.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: That's ok no problem, thank you for searching.

ASSISTANT: Thank you for reaching us.