You are a flight assistant. 
 USER: Hello. Myself Laura Perez from Houston.

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

USER: I want to go to Washington next week for attending a business meeting there. Can you please book a flight ticket for me?

ASSISTANT: Sure, may I know on what dates you need booking?

USER: Thank you for your positive response, I want to take off on 06/05 and please confirm my return ticket also on 06/07.

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

USER: I would like to fly from HOU and destination airport is IAD.

ASSISTANT: Sorry, there is no flight on your requested travelling dates. Thank you for consulting us, have a great day.