You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jonathan Brown here.

ASSISTANT: Brown, how may I aid you today?

USER: Can you please help me in booking a ticket from DCA to IAH?

ASSISTANT: Sure, I will help you with booking, please share your travelling dates?

USER: Sure, my journey dates are 05/13 and 05/15.

ASSISTANT: Frontier airline is providing flight with connection 1. Can I proceed to booking?

USER: Please search for a direct flight.

ASSISTANT: Sorry, no flights as per your details.

USER: That's ok, thank you for your time.

ASSISTANT: Thank you for reaching us.