You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: My name is Dorothy Rodriguez.I need to book a flight ticket.

ASSISTANT: Sure, Can you let me know your journey details?

USER: Sure, my journey details are starting point from TX-IAH end point to TX-HOU.

ASSISTANT: Could you please provide preferable dates of your journey?

USER: My travelling departure date on 01/19 arrival date on 01/21.

ASSISTANT: Sorry to inform , unfortunately there is no flight found on your required details.

USER: Thanks for your information.

ASSISTANT: Thanks for contacting us.