You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to travel PHL from LAX, can you help me to book the flight ticket?

ASSISTANT: Please provide your trip dates.

USER: My journey dates are 04/07 and 04/09.

ASSISTANT: Do you need any connection limit?

USER: I would prefer single connection flight.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the evening.

ASSISTANT: May I know your name?

USER: Myself Shirley King.

ASSISTANT: There are no flights available on your routes.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.