You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gary Wright.

ASSISTANT: How may I help you out/.

USER: I want to book a ticket from IAH to ATL to attend seminar, can you help me in booking?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I am departing on 06/16 and return on 06/18.

ASSISTANT: Sorry, there are no flights found in our database.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.