You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jerry Phillips.

ASSISTANT: How may I assist you?

USER: I want to attend a workshop at Seattle, can you book a ticket from DEN to SEA?

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, my travelling dates will be 05/12 and 05/14.

ASSISTANT: Sorry, no flights found on your preferable dates to reserve your ticket.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.