You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Jason Campbell.

ASSISTANT: How may I assist you?

USER: I am planning to visit Las Vegas, will you help me in booking the flight ticket from DFW to LAS?

ASSISTANT: Sure, may I know your planned journey dates please?

USER: My travelling dates are Apr 03 and Apr 05.

ASSISTANT: Do you need a connecting flight?

USER: I need a flight with single connection.

ASSISTANT: May I know your departure and arrival timings?

USER: My depart and return time must be in morning.

ASSISTANT: Do you have any preferences?

USER: No, thank you for asking.

ASSISTANT: Jason Campbell, no flights has been found on your planned journey dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.