You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Lopez.

ASSISTANT: How can I help you?

USER: I would like to book a ticket from EWR to IAH, can you please help me out?

ASSISTANT: Let me know your travel dates.

USER: I am travelling on these dates July 16th and 18th.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight.

ASSISTANT: Sorry, no flights found for your travelling dates.

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

ASSISTANT: Thanks.