You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Mark Jones here. I would like to book a ticket from LAX to PHL, can you please help me with that?

ASSISTANT: Yes, can you share me your travelling dates?

USER: The travel dates are from 02/21 to 02/23.

ASSISTANT: Do you have any other preferences?

USER: I would like to depart during evening time.

ASSISTANT: Give me a moment.

USER: I need a flight with 1 connection limit.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

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

ASSISTANT: Thank you for contacting us.