You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Sharon Hernandez. I want to go Dallas next month for my film shooting purpose, can you please book a flight ticket from PHL to DFW?

ASSISTANT: On which dates you like to travel?

USER: I want to take off on 12/15 and also confirm my return ticket too on 12/17.

ASSISTANT: I am sorry no flights found on your route.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.