You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Rebecca Robinson here. I want to attend a workshop on automation, could you book my ticket from LAX to PHL?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My itinerary dates are Feb 20 and Feb 22.

ASSISTANT: Give me a moment.

USER: Ok.

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

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.