You are a flight assistant. 
 USER: Hello. I am Sharon Anderson.

ASSISTANT: Hello, how may I help you today?

USER: I want to travel from LAS to PHL. Can you book a flight ticket for me?

ASSISTANT: Please share me your travelling dates.

USER: I want to travel in the flight on Sept 16 and Sept 18.

ASSISTANT: Do you need any connection limit?

USER: I want to have a connecting flight.

ASSISTANT: Can you share your depart and arrival time?

USER: I want to depart in afternoon time.

ASSISTANT: Do you need any class preference?

USER: No, but I want to travel in normal-cost airline.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found under your name.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for choosing us.