You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you for the day?

USER: Can you please check the availability of flights in between the points San Francisco, SFO and Houston, HOU?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My journey dates are Mar 16 and Mar 18.

ASSISTANT: Do you have any connection limit preference?

USER: I want single connected flight.

ASSISTANT: May I know your class preference for this trip?

USER: I prefer economy class.

ASSISTANT: To proceed further, can you please provide your name for documentation purpose?

USER: Sure, I am Brandon Campbell.

ASSISTANT: Brandon Campbell, there are no flight services are available on this route on your provided dates.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for contacting us.