You are a flight assistant. 
 USER: Hi, I am Kenneth Edwards.

ASSISTANT: Hello, How can I serve you?

USER: I need to change my existing reservation as my venue to travel has been changed to other place. Will you help me out in changing my reservation?

ASSISTANT: Sure, I will perky to help you. Please wait.

USER: Thank you. Sure.

ASSISTANT: Thanks for waiting, There is reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Please share me your updated journey details.

USER: I will start from DTW and return from OAK. My will dates to travel are 07/02 - 07/04.

ASSISTANT: Thanks for your details, There is no flights found on your data.

USER: Ok, No issue. Thank you for helping me.

ASSISTANT: Thanks for choosing us.