You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: My trip got postponed, can you please change my reservation?

ASSISTANT: Sure, may I know your name?

USER: I am Debra Lopez.

ASSISTANT: We found a reservation on your name, can you please share your travel dates?

USER: My travel dates are from Nov 2nd to Nov 4th.

ASSISTANT: May I know your airport codes?

USER: My source and destination airport codes are IAD and DFW.

ASSISTANT: Do you have any specifications?

USER: I want a single connection in between my journey.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.