You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Dorothy Young want to visit PHL, can you book a ticket from HOU?

ASSISTANT: Your travelling dates please?

USER: Sure, my travelling dates will be 07/20 and 07/22.

ASSISTANT: I am sorry no flights found on your route.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.