You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Green.

ASSISTANT: Gregory Green, what can I do for you?

USER: I would like to book a ticket to Dallas, can you please help me out in booking from EWR to DFW?

ASSISTANT: Sure, I am willing to help you for this. When you are planning to travel?

USER: I am travelling on these dates NOV 18th and 20th.

ASSISTANT: Do you have any requirements?

USER: I need a halt.

ASSISTANT: Gregroy Green sorry for inconveinence, no flights are found with your criteria.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you very much for utilizing our agency.