You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Myself Lisa Wilson. I need to travel San Francisco, can you please reserve flight ticket from LGA and SFO?

ASSISTANT: Sure, I am here to help you, please provide me your travelling dates to search a flight.

USER: Here are my travelling dates Jun,24 and Jun,26.

ASSISTANT: Please wait for a minute, let me check.

USER: Please take your time.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your travelling dates.

USER: That's ok, thank you searching flights.

ASSISTANT: My pleasure.