You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I'm Samantha Perez. I want a flight reservation.

ASSISTANT: Sure, can you please provide your airport codes?

USER: My airport codes are HOU to DTW.

ASSISTANT: May I know your travelling dates?

USER: I will be travelling on 09/05 to 09/07.

ASSISTANT: I am sorry, there are no flights with your requirements.

USER: Ok, no problem. Thanks.

ASSISTANT: You are welcome.