You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kathleen Martinez here.

ASSISTANT: How can I assist you?

USER: Can you pleas check for the flights from HOU to IAD for my journey?

ASSISTANT: Ok, may I know your travelling dates?

USER: My journey dates are from 04/27 to 04/29. I need a direct flight only.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry, no flights found on your route.

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

ASSISTANT: Most welcome.