You are a flight assistant. 
 USER: Hi. I am Raymond Hernandez.

ASSISTANT: Hello, how can I help you today?

USER:       I have to book a flight ticket  that I am unable to do, could you please help me in booking flight ticket on dates 04/17 and 04/19?

ASSISTANT: Sure, kindly share your airport codes.

USER: My airport codes are MCO and MSP.

ASSISTANT: Do you have connection preference?

USER: I need a connecting flight.

ASSISTANT: Is there any other specification?

USER: I would like to depart at evening.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.