You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: Emma Gonzalez here. I want to attend my son's convocation ceremony, could you book my ticket from LAX to IAD?

ASSISTANT: Ok, can you please share your planned dates for the following journey?

USER: My itinerary dates are 01/20 and 01/22.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: Sorry to inform you, there are no flights currently available on your requested route.

USER: No problem, thank you.

ASSISTANT: Thank you for approaching our services.

USER: Welcome.

ASSISTANT: Have a nice day.