You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am looking for a flight from LAS to HOU, can you help me in booking?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Sure, my planned travel dates are Apr 14 and Apr 16.

ASSISTANT: May I know your name?

USER: Myself Samuel Hill.

ASSISTANT: Sorry Samuel Hill, no flights are available on your route.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.