You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight ticket to OAK from LGA.

ASSISTANT: Please tell me your travelling dates?

USER: Sure, my trip dates are 28 and 30 on the month of July.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is a connecting flight with fare 100 and 1009 as flight number provided by South West Airline and the ticket is available in economy class. Shall I proceed with booking?

USER: Make sure my return time is afternoon.

ASSISTANT: Ok, I can recheck with that. Mean While may I know your name?

USER: Sure, my name is Andrew Lopez.

ASSISTANT: Sorry, no flights found on your route.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.