You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Shirley Gonzalez here.

ASSISTANT: How can I assist you today?

USER: I want to attend a workshop on robotics, please book my ticket from JFK to SEA.

ASSISTANT: On which dates do you want to travel?

USER: My itinerary dates are 09/21 and 09/23.

ASSISTANT: Ok, give me a minute. Sorry, no flight is found.

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.