You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I'm Helen Jackson, planning to visit New York city. Can you please book me a ticket from HOU to EWR?

ASSISTANT: Sure, I will help you with booking, please share your travelling dates?

USER: My preferable journey dates are from 09/21 to 09/23.

ASSISTANT: Helen sorry for the inconvenience, no flights as per your details.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Thank you for reaching us.

USER: Thank you for providing information.