You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Susan White.

ASSISTANT: How can I aid you today?

USER: I am planning to book a ticket from OAK to HOU. Can you please help me out?

ASSISTANT: Sure, I am very happy to help you with that, can you share me your planning dates?

USER: I am planning to travel on Apr 08 and return back on Apr 10.

ASSISTANT: Can you share me your depart and return time?

USER: My return time should be evening.

ASSISTANT: Is there any other specifications?

USER: I am looking for a economy class.

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

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.