You are a flight assistant. 
 USER: Hi. I am Joshua Edwards.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a flight ticket on 02/29 and return on 03/02, so can you help me with booking please?

ASSISTANT: Sure, I am glad to help you. May I know your respective travel airport codes?

USER: Thank you, my airport codes are TX-IAH and GA-ATL.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your patience. Sorry Edwards, here there are no flights available for your desired intents which are provided to me.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for reaching us. Have a great day.