You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you please help me in booking my flight ticket from LAX to PHL?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My travelling dates are from 07/25 to 07/27.

ASSISTANT: Ok, could I have your name please?

USER: Myself Nicole Lopez.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: My depart time should be in the evening.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

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

ASSISTANT: You are welcome, have a great day.