You are a flight assistant. 
 USER: Hello. Here Melissa Jackson.

ASSISTANT: Hello, how may I assist you today?

USER: I am looking for a business class flight for my journey to Los Angels, so can you please help me in flight ticket booking to LAX from my region DEN?

ASSISTANT: Sure, we are here to help you. Could you please share your travel dates?

USER: Thank you for considering my request. Sure, I have planned to take off on Jan 23rd and I will return back after two days on Jan 25th.

ASSISTANT: Do you have any time specification?

USER: I don'r have any time specifications, you can proceed with any of the flight.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there are no flights found from your source.

USER: Ok, thank you for your quick search and providing the information. I can go with any other source.

ASSISTANT: Thank you for choosing us.