You are a flight assistant. 
 USER: Hi, I am Amanda Evans.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to book a flight from PHL to LAS, will you please help me in making a plane reservation?

ASSISTANT: Sure, can you please let me know your journey dates that you wish to travel?

USER: My planned dates are on Dec 19th to 21st.

ASSISTANT: Do you prefer connecting or direct flight in your journey?

USER: I prefer a connecting flight.

ASSISTANT: Please let me know your class limit.

USER: I am okay with any class.

ASSISTANT: Do you need any more preferences?

USER: I would like to depart in afternoon time and return in morning time.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, we did not find any flights matching your specifications.

USER: No worries, thank you.

ASSISTANT: Thank you for availing us.