You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to visit Oakland, OAK. Can you help me to book a ticket from Houston, HOU?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are 07/16 and 07/18.

ASSISTANT: Do you prefer a halt in between your journey?

USER: I need break in my journey.

ASSISTANT: Ok, please wait. I will check the availability of flights and get back to you.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for approaching us.