You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Samantha Young here.

ASSISTANT: How may I assist you?

USER: Could you book my ticket from ORD to DEN?

ASSISTANT: Can you please share your planned travel dates please?

USER: My trip dates are Oct 15 and Oct 17.

ASSISTANT: Do you have connection preference?

USER: I need a connecting flight.

ASSISTANT: May I know your departure and arrival timings?

USER: I want to depart in the evening.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Samantha Young, no flights has been found on your planned travel dates.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.