You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am Justin Clark. I would like to book a ticket from IAH to PHL, can you help me?

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

USER: My travel dates are 11/06 and 11/08.

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

USER: No problem, thanks for checking.

ASSISTANT: Thank  you for reaching us.