You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel from DEN to ORD as a business trip. Can you do the reservation?

ASSISTANT: Sure,may I know your name please?

USER: I am Matthew Jackson.

ASSISTANT: Matthew Jackson. May I know the travel dates?

USER: My journey dates are 04/06 and 04/08.

ASSISTANT: Would you prefer any halts in your journey?

USER: I need direct flight.

ASSISTANT: Do you have any airline time preferences?

USER: I need departure time is morning.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: I regret to inform that, there are no flights on your route with your preferences.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for approaching us. Have a nice day.