You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to participate in Boston marathon, so please book my ticket from Orlando.

ASSISTANT: Sure, I am here to help you out. May I know your airport codes please?

USER: My genesis and terminus airport codes are MCO and BOS.

ASSISTANT: May I know your travelling dates please?

USER: My itinerary dates are 07/26 and 07/28.

ASSISTANT: May I know your name please?

USER: Jonathan Wilson here.

ASSISTANT:  Jonathan Wilson , there are no flights in your roue.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.