You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: James Anderson here.

ASSISTANT: Yes.

USER: I would like to book a ticket from SEA to DEN, can you please help me in booking a ticket?

ASSISTANT: Sure, I am here to help you out. Please share me your trip dates.

USER: The travel dates are from 02/06 to 02/08.

ASSISTANT: Sorry James, there is no flight in your route with your dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.