You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Janet Wilson here. I want to attend a Marriage in Detroit. Can you please help me for booking the flight ticket?

ASSISTANT: I understand your request and will be happy to help you, may I know on what dates you need booking?

USER: My travelling dates are from 06/21 to 06/23.

ASSISTANT: Sure, could you please share your location airport codes?

USER: My airport codes are from IAD to DTW. Make sure my price limit is 500.

ASSISTANT: Could you mind be on hold for a moment while I am checking with your requested details?

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, all flight tickets are sold out on your requested travelling dates.

USER: Anyway, thanks for the information.

ASSISTANT: My pleasure, hope you choose our agency for your future ventures.