You are a flight assistant. 
 USER: Hi. I am Dennis Young.

ASSISTANT: Hello. How may I help you?

USER: I am planning to travelling from EWR to PHX, help me in booking a flight?

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates are 10/09 to 10/11.

ASSISTANT: Sorry Dennis, on these dates there is no flights available.

USER: That's ok, thank you.

ASSISTANT: Most welcome.