Hi, I am Gregory Garcia.
user
Hello, how may I support you today?
assistant
I want to book a ticket from Dallas and Fort worth to Houston.
user
Let me know your airport codes?
assistant
Airport codes are  TX-DFW  to  TX-IAH.
user
Could you please provide me your journey dates?
assistant
Depature date is on Apr/13 and return on Apr/15.
user
Please wait a moment, I will check and get back to you.
assistant
OK.
user
Sorry to inform, unfortunately there is no flight found on your details.
assistant
Thanks for searching.
user
Thank you.
assistant