You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I would like to meet my sister at Oakland, please help me in booking a ticket from HOU to OAK.

ASSISTANT: Sure, may I know your trip dates?

USER: My planned trip dates are on Oct 22 and Oct 24.

ASSISTANT: Do you have any class preference?

USER: Any class is comfortable for me.

ASSISTANT: Is there any other specifications?

USER: I need a flight with single connection.

ASSISTANT: Can I know your good name?

USER: My name is Rebecca Jackson.

ASSISTANT: Sorry, no flights are found on your trip dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.