You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please book me a ticket from HOU to IAH?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My preferable journey dates are Oct 19 and Oct 21.

ASSISTANT: Do you have any preferences?

USER: No, thanks for asking.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

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

ASSISTANT: Can I know your name?

USER: My name is Emily Lopez.

ASSISTANT: Thank you for contacting us.

USER: Thank you for providing information.