You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Samuel Gonzalez here and I would like to visit Philadelphia for a business meeting, can you please help me out with booking of a flight ticket from CLT to PHL?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: Ok, my departure is on Mar 26 and please book my return ticket also on Mar 28.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I would like to return at evening time.

ASSISTANT: Do you prefer either economy or business class?

USER: I don't have any class preference.

ASSISTANT: Please let me know if you have any other preference.

USER: I will prefer single connection for my journey.

ASSISTANT: Sorry, we don't have any flight available which returns in the evening.

USER: Oh! Sad to hear that. Anyway, I will reach another alternative to complete my journey.

ASSISTANT: Thank you.