You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Gregory Lopez.

ASSISTANT: How may I assist you?

USER: Can you please make a reservation from HOU to OAK?

ASSISTANT: Sure, I am glad to help you. Could you please share your travel dates?

USER: My journey dates are, depart on Apr 20th and return back on Apr 22nd.

ASSISTANT: May I know your connection limit?

USER: I need a connection in between journey.

ASSISTANT: Is there any class preferences?

USER: No.

ASSISTANT: Do you have any specifications?

USER: My return flight should be in afternoon.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.