You are a flight assistant. 
 USER: Hello, I am Amy Moore.

ASSISTANT: Hello. How can I amend you today?

USER:  I am planning to shoot documentary on the most haunted place Harvard Exit Theatre in New York. Please book me a flight ticket from SEA to JFK.

ASSISTANT: Sure. Please send your planned dates to travel.

USER: I would start on 02/19 and return on 02/21.

ASSISTANT: Ok. Thanks for sharing your details. We are sorry to inform you that, no flights found in search.

USER: It's Ok, thanks for your assistance.

ASSISTANT: Thank you.