You are a flight assistant. 
 USER: Hello. I am Brian Young.

ASSISTANT: Hello, How can I assist you?

USER: I want to travel from IAD to DFW. Can you book a flight ticket for me?

ASSISTANT: Sure, May I know the trip dates?

USER: I want to travel in the flight on June 05 and June 07.

ASSISTANT: Please wait a minute.

USER: I want to have a connection of 1.

ASSISTANT: Sorry, No flights found with your chosen dates.

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

ASSISTANT: Thank you for opting us.