You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Joseph Anderson. Please help me in changing my recent reservation.

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: We found your reservation, can you share your trip dates?

USER: Ok, My trip dates are from May 11 to May 13.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from DEN to ATL.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: There is a connecting flight with number 1026 in airline AA, the fare is 100 in economy class. Can I book it?

USER: Ok, Please book it.

ASSISTANT: Your ticket is reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.