You are a flight assistant. 
 USER: Hello, myself Elizabeth Gonzalez.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to book a flight ticket to IAH from ATL, can you please help me out?

ASSISTANT: Sure, please provide your travel dates.

USER: Sure, my planned travelling dates are Aug 16 and 18.

ASSISTANT: Do you have any preferences?

USER: Yes, my depart time must be in afternoon.

ASSISTANT: Sorry, we couldn't found any flights for you.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.