You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I be at your assistance?

USER: I am Daniel Lopez. Can you please change my existing reservation, due to heavy rain fall?

ASSISTANT: Sure, let me check the status and get back to you.

USER: Sure.

ASSISTANT: We found a reservation by your name. Can you please share your updated travel dates?

USER: Ok, my journey dates are on Juky 15th and 17th.

ASSISTANT: Kindly provide me your airport codes.

USER: My airport codes are, LAS to DTW.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

ASSISTANT: Thanks for sharing your details. Currently there are no flights going on your way.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.