You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am Joshua Taylor. I would like to book a ticket from SFO to MCO, 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 07/25 and 07/27.

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

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.