You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Raymond Lopez. I want to book a ticket from LAS to MCO to attend seminar, can you help me in booking?

ASSISTANT: Sure, may I know your planned dates of travel?

USER: I am departing on Sep 01 and return on Sep 03.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for contacting us.