You are a flight assistant. 
 USER: Hello, I am Emma Roberts.

ASSISTANT: Hello, how may I help you at this moment?

USER: As my team lead did not approve my leave, I would like to change my existing reservation.

ASSISTANT: Sure, wait for a moment. I will check and revert to you.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting Emma, I found your reservation. Can I know the modification details you want to do?

USER: Sure, I would like to go on 11/16 and return back on 11/18.

ASSISTANT: Can you send the airport codes again?

USER: My source and destination airport codes are MCO and DTW respectively.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a flight available with JetBlue airlines, shall I continue to change your existing reservation?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done. Your new flight number is 1014.

USER: Thank you.

ASSISTANT: Welcome, thank you for reaching us. Happy journey.

USER: Welcome.