You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am looking for a flight from SFO to PHX, can you please help me in booking?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My travelling dates are May 14 and May 16.

ASSISTANT: May I know your name?

USER: My name is Eric Williams.

ASSISTANT: Sorry Eric Williams, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.