You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Please book a flight ticket from PHL to DCA.

ASSISTANT: Sure, help me with the trip dates?

USER: My trip is in Oct from 10th to 12th.

ASSISTANT: May I know your good name please?

USER: William Martinez here.

ASSISTANT: Do you have any requirements for this trip?

USER: I prefer to travel with the comforts of business class. I am comfortable to travel with a single connecting flight.

ASSISTANT: Sorry, no flights were available at this moment due to some technical issues.

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

ASSISTANT: Thank you for reaching us.