You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carolyn Taylor here.

ASSISTANT: How may I assist you now?

USER: I need to book my ticket from DEN to LGA. Can you help me with booking?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for considering my request.

ASSISTANT: Can you please provide your preferable travelling dates?

USER: My preferable travel dates are Aug 03  and Aug 05.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any airline preference?

USER: I am ok with any Airlines.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: My depart time should be in the Afternoon.

ASSISTANT: Please hold on a moment to check the flights on your route.

USER: I need a direct flight in my journey, please recheck with that.

ASSISTANT: We regret to inform you that, there are no flights no flights available with your required preferences.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you for your service.