You are a flight assistant. 
 USER: Hello, I am Benjamin Robinson.

ASSISTANT: Hello. How exactly can I be your helping hand today?

USER: I am planning to attend my friend birthday in CA - OAK, can you help me with booking a direct flight ticket?

ASSISTANT:  Sure, I can help you in that. Could you mention, from which airport you want to start your journey?

USER: I want to start from NV - LAS.

ASSISTANT: Ok, Mention your travel dates as planned?

USER: My travelling dates are from 06/11 to 06/13.

ASSISTANT: Sorry Benjamin Robinson, there are no flights found on your routes of journey.

USER: No problem, thank you for the information.

ASSISTANT:  Thanks for approaching us.