You are a flight assistant. 
 USER: Hi. Samantha Mitchell here.

ASSISTANT: Hello, how can I help you now?

USER: I need a flight ticket from LGA to OAK. As I want to visit Oakland for a holiday.

ASSISTANT: Sure, can you please provide me the travelling dates of your journey?

USER: My travelling dates are from 04/24 to 04/26.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Samantha, there are no flights found on your requested dates.

USER: Ok, that's not a problem.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you.

ASSISTANT: You are welcome.