You are a flight assistant. 
 USER: Hi, I am Timothy Walker.

ASSISTANT: Hello, how may I help you today?

USER: I would like to go to Atlanta to visit Georgia Aquarium with my family on 05/20. Can you make a direct flight reservation?

ASSISTANT: Sure, I am happy to help you in booking. Could you help me with your airport codes?

USER: Sure, I am heading from HOU to ATL.

ASSISTANT: Ok, do you have any limitations in price?

USER: Yes, it will be helpful if price limit is 200.

ASSISTANT: Ok, let me know your return dates please?

USER: Sure, I need to catch a return flight on 05/22.

ASSISTANT: Ok, please wait for a while I will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Ok, no worries at all. Thanks for your kind service.

ASSISTANT: Thanks for connecting with us.