You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you today?

USER: I am Edward Baker. I want to book a flight ticket to Las Vegas, please help me with a direct flight.

ASSISTANT: Sure, Can you share me your travelling dates for booking purpose?

USER: My travelling dates are from 11/05 to 11/07.

ASSISTANT: May I now your airport codes?

USER: I want to fly from OAK to LAS.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting unfortunately there is no flights found on your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for choosing us.