You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking to book a flight ticket from OAK to HOU. Can you please find a flight for me?

ASSISTANT: Sure, can I know your travelling dates?

USER: Thank you. I am willing to travel on these dates Dec 17 and Dec 19.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Reserve the flight ticket with the name Rebecca Hernandez.

ASSISTANT: Do you have any connection limit?

USER: I prefer a direct flight to travel.

ASSISTANT: Do you have any other specifications?

USER: No, I didn't have any other preferences.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: It's ok, not a problem with that. Thank you for searching the flights for me.

ASSISTANT: Thank you for reaching us.