You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you aid me to book a flight ticket from IAH to LAX?

ASSISTANT: Sure, may I know the planned travel dates?

USER: I planned my trip on the dates Sept 15 and Sept 17.

ASSISTANT: Please provide me the specifications.

USER: I am looking for a direct flight.

ASSISTANT: May I know the name?

USER: Myself Sharon Martinez.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.