You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to attend for a seminar in DFW. Can you please make a reservation from IAD?

ASSISTANT: Sure, can I know your travel dates?

USER: My journey dates are May 10 to 12.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I prefer business class to travel.

ASSISTANT: May I know your good name?

USER: I am Jeffrey Wilson.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.