You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Kathleen Carter.

ASSISTANT: How may I help you?

USER: I am looking for a flight from HOU to IAD, can you help me in booking the flight ticket?

ASSISTANT: Please provide your travel dates.

USER: Sure, my travel dates are 07/13 and 07/15.

ASSISTANT: Sorry, no flights found for your travel dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thanks.