You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: Amy Johnson here. Can you please help me in booking my flight from HOU to visit OAK?

ASSISTANT: Sure, please provide your travelling dates.

USER: Sure, my planned travel dates are Jan 26th and 28th.

ASSISTANT: Do you have any class preference?

USER: No, I don't have any class preference.

ASSISTANT: Do you have nay other requirements?

USER: I need a direct flight. My depart time must be in the afternoon.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, not a problem. Anyways, thank you.

ASSISTANT: Thank you for reaching us.