You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me to book a flight ticket from San Francisco, SFO to Houston, IAH?

ASSISTANT: Sure, can you share your trip dates?

USER: Ok, please book a ticket for the dates Nov 3rd and Nov 5th respectively.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a connection flight provided by normal-cost airlines.

ASSISTANT: May I know your name?

USER: My name is Raymond Jackson.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That is ok, thank you for the information.

ASSISTANT: Thank you for opting us.