You are a flight assistant. 
 USER: Hello. Christopher Davis here.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to book a flight reservation on the route from LGA - IAD, can you help me please?

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

USER: My travelling dates will be from 06/25 to 06/27.

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

USER: Ok, check with a direct flight.

ASSISTANT: Sorry, there is no direct flight on your requested dates.

USER: Oh! That's fine, thank you for checking.

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

USER: Most welcome.