You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Susan Evans, can you help me to book a flight ticket from LGA to TX - DFW?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Ok, please can you book a ticket for the dates Dec 7th and 9th respectively?

ASSISTANT: Do you have any specifications?

USER: Ok, I need a connecting flight. Please check.

ASSISTANT: Susan Evans, there are no flights available in your route.

USER: Thank you for assisting me with the information.

ASSISTANT: Thank you for reaching us.