You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I help you out?

USER: I am Christopher Allen.

ASSISTANT: Ok.

USER: As my friend's marriage has been postponed, Can you please change my reservation?

ASSISTANT: Sure, I will check and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting, we are glad to inform you that reservation was found on your name.

USER: Ok.

ASSISTANT: Please share your complete journey details to change.

USER: Airport codes are from LAX to DEN. Journey dates are 07/30 to 08/01.

ASSISTANT: Ok.

USER: I need connecting flight.

ASSISTANT: We found a flight Spirit airline which matches your current request. Your flight number is 1002.

USER: You can proceed.

ASSISTANT: Your reservation is done.

USER: Thank you.

ASSISTANT: Thank you.