You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: John Davis here.

ASSISTANT: Davis, how may I help you?

USER:  Can you please help me out in booking the ticket from LAX to IAD? As I have to attend seafood festival.

ASSISTANT: Please share your itinerary dates.

USER: Ok, my itinerary dates are 11/19 and 11/21.

ASSISTANT: Please hold on for a while.

USER: Ok, I will wait.

ASSISTANT: Sorry, no flight is available on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.