You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ashley Harris.

ASSISTANT: How can I aid you?

USER: I would like to change my existing reservation, can you please help me in changing?

ASSISTANT: Sure, I am here to help you. Please, wait for a while.

USER: Sure.

ASSISTANT: We have found a reservation on your name. May I know your airport codes please?

USER: My airport codes are from MCO to SFO.

ASSISTANT: Let me know your travel dates please.

USER: My travel dates are Dec 30th and Jan 1st.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: May I know about your class preference?

USER: No, I don't have any class preference.

ASSISTANT: Do you have any other preferences?

USER: The depart time should be afternoon.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Frontier airlines is providing you the connecting flight, depart time is at 14 PM and arrival is at 14 PM. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved with flight-1013.

USER: Thank you.

ASSISTANT: Thank you for choosing us.