You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,. How can I help you?

USER: I want to travel to Houston from Washington. My airport codes are DC-DCA to TX-HOU.

ASSISTANT: OK, Can you please provide your journey dates? And also your good name please?

USER: Yes, my journey dates are from july/1 to july/3. I am Rebecca Hernandez.

ASSISTANT: OK, Please wait for a moment. I will check and get back to you.

USER: OK>.

ASSISTANT: Thank you for waiting. Sorry for inconvenience, we did not find any flights matching to your requirements.

USER: OK,. Thank you for your service.

ASSISTANT: Thank you for contacting us.