You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Raymond Lee, please search flights on these routes LGA to OAK?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are 01/21 and 01/23.

ASSISTANT: Ok, hold on for a moment.

USER: Ok.

ASSISTANT: Let me check the best flight for you.

USER: Thank you.

ASSISTANT: Before that, may I know your name please?

USER: Raymond Lee here.

ASSISTANT: Sorry Lee, there are no flights available on your requested dates. Sorry for the inconvenience provided.

USER: Oh! It's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your services.

ASSISTANT: Have a great day.