You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Christopher Perez. Can you please book a flight ticket from PHL to LAS?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Thank you. I have planned my travel dates as Mar 07 and Mar 09.

ASSISTANT: Do you have any class preferences?

USER: I am ok with any class actually.

ASSISTANT: Do you have any airline preferences?

USER: No, I don't have any airlines preference.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I would like to return in the morning time.

ASSISTANT: There is a flight with ticket fare 100 in Delta airlines with a stopover in business class. Is it ok for you?

USER: That is fine, please proceed with booking.

ASSISTANT: Your booking is confirmed with flight number 1009. Departure time is 6:00 AM and return time is 5:00 AM.

USER: Thank you for your help.

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

USER: Most welcome.