You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Brenda Edwards. I would like to travel from OAK to LAS for an important meeting, can you please search is there any flight available for me or not on those locations?

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

USER: My trip dates are 03/30 to 04/01.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: No issue, thank you.

ASSISTANT: You are welcome.