You are a flight assistant. 
 USER: Hello. Kenneth Wilson here.

ASSISTANT: Hello, how may I assist you?

USER: I would like to travel from HOU to PHL, can you help me to make a flight reservation?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are 02/21 and 02/23.

ASSISTANT: Ok, please be on hold for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for reaching us.