You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change my existing reservation, can you please help me out?

ASSISTANT: Sure, may I know your name for the changing process?

USER: I am Emily Moore.

ASSISTANT: Your change reservation  found. Can you confirm your new airport codes?

USER: My airport code are PHX to MCO.

ASSISTANT: May I know your planned travel dates?

USER: I will fly on Jan 11 and recur on Jan 13.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a direct flight.

ASSISTANT: Do you have any specifications on the airline preference?

USER: No.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any specifications on the class preference?

USER: No.

ASSISTANT: Unfortunately no flights found on your required dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, thank you for reaching us.