You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket to attend an event which is going to held at WA. Can you help me?

ASSISTANT: Sure, May I know your travelling airport codes?

USER: DTW and SEA are my airport codes.

ASSISTANT: May I know on which dates you are willing to travel?

USER: Sept 16th and 18th are my travelling dates.

ASSISTANT: Would you like to fly in economy class flight or business class flight?

USER: I am comfortable with any class.

ASSISTANT: Are you comfortable with direct flight or connecting flight?

USER: Yes, I need a break.

ASSISTANT: Do you have any specific time preference for journey?

USER: No.

ASSISTANT: For further proceeding, may I know your good name?

USER: Robert Taylor here.

ASSISTANT: Sorry to inform you that, there is no flight found as per your travelling details.

USER: No issue, Thank you.

ASSISTANT: Thank you for reaching us.