You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Deborah Moore.

ASSISTANT: Ok, how may I assist you?

USER: Can you help me booking flight on 09/08?

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My airport codes are HOU and ORD.

ASSISTANT: May I know your return date?

USER: I would like to return on 09/10.

ASSISTANT: Sorry, no flights found with your preferable dates.

USER: Oh! It's ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.