You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Hernandez.

ASSISTANT: How can I guide you for today?

USER: I am planning to sell my house at Oakland, can you please book me a flight ticket from DFW to OAK?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My preferable journey dates are from 06/15 to 06/17.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure, take your own time.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for contacting us, have a nice day.