You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can we help you?

USER: Can you please help me with changing my recent reservation?

ASSISTANT: I am happy to help you with your concern. Sure, can you please let me know your name to check with the reservation status?

USER: My name is Nancy Wilson.

ASSISTANT: Thank you for sharing your name, Nancy Wilson. Please allow me 2-3 minutes while I check with the status.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, Nancy Wilson. We found reservation under your name, can you please share your trip dates?

USER: Thank you, my trip dates are Feb 21 and 23.

ASSISTANT: May I know your source and destination airport codes?

USER: Airport codes are MCO and PHL.

ASSISTANT: Are you comfortable with connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Are you looking for any class preference?

USER: No.

ASSISTANT: Would you like to fly with any time, or do you have any specific time preference?

USER: That's all, thanks for asking.

ASSISTANT: Thank you for sharing all your required details, Nancy Wilson. Nancy Wilson, sorry there is no flight available for the mentioned dates.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for reaching us. Hope we reach our service again!.