You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kathleen Taylor here.

ASSISTANT: How may I aid you?

USER: Please help me out in booking the ticket from DFW to LGA.

ASSISTANT: Sure, I will help you. Can you please share your planned travel dates?

USER: My trip dates will be 03/15 to 03/17.

ASSISTANT: Do you have any connection preference?

USER: Yes, I want a connected flight.

ASSISTANT: May I know your specific timings of your journey?

USER: My depart time must be in the evening.

ASSISTANT: Do you have any other specifications?

USER: I want business class flight.

ASSISTANT: Kathleen Taylor, no flights has been found on your requirements.

USER: That's ok. Thank you.

ASSISTANT: Thank you for approaching us.