You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning for a round trip from OAK, can you please help me to book my flight ticket?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I will be travelling on 07/14 and also book the return ticket on 07/16.

ASSISTANT: Please let me check for a best flight on your planned dates.

USER: Sure.

ASSISTANT: May I know your name?

USER: My name is Justin Jackson.

ASSISTANT: Sorry Justin, no flight found on your route.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.