You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I oblige you?

USER: On my name Scott Nelson please book a flight ticket to Washington, DCA. Can you help me in booking from Houston, IAH?

ASSISTANT: Sure, can I have your dates of travel?

USER: My travelling dates are from 06/24 to 06/26.

ASSISTANT: Please wait for a while, let me check and revert to you.

USER: Sure.

ASSISTANT: Sorry, no flights found as per your request.

USER: Ok, No issues. Thank you.

ASSISTANT: Thanks for contacting us.