You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Houston, HOU. Can you please book me the ticket from Oakland, OAK?

ASSISTANT: Sure, may I know your travel dates?

USER: My preferable journey dates are from 09/08 to 09/10.

ASSISTANT: May I know your name?

USER: My name is Michelle Thomas.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your preferred dates.

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.