You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you help me?

ASSISTANT: Sure, may I know your name?

USER: Brenda Young here.

ASSISTANT: We found a reservation on your name. Can you please share your travel details?

USER: My airport codes are BOS-DTW. Dates are 11/11 and 11/13.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your preferable dates.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for availing us.