You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Brown.

ASSISTANT: How can I guide you for today?

USER: Do you have any direct flight from MSP to attend a business meeting in IAD?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I am willing to travel on 01/26 and 01/28.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: Price limit is 1000.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: That's fine, not a issue. Thanks for your information.

ASSISTANT: Thank you for contacting us, have a nice day.