You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: Please help me in changing my existing reservation under the name of Shirley Lee.

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: We found a reservation with your name, kindly provide your journey details.

USER: My new airport codes are SEA - SFO. I will start my journey on 12/05 and ends on 12/07.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: We found a flight with number 1023 and Delta as airline, there is a connection within your journey. Can I go with booking?

USER: Ok, proceed.

ASSISTANT: Your booking is done.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.