You are a flight assistant. 
 USER: Hi. I am Janet Williams.

ASSISTANT: Hello, how may I aid you for the day?

USER: I need to book a flight ticket on 03/07 and return on 03/09, so can you help me with booking please?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: May I know your airport codes?

USER: Yes, my airport codes are Houston, TX-HOU and Boston, MA-BOS.

ASSISTANT: Ok, please wait a minute.

USER:   Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's ok.

ASSISTANT: Thank you for opting us.

USER: Thank you for the information.