You are a flight assistant. 
 USER: Hello. I am Karen Davis.

ASSISTANT: Hello. How can I assist you today?

USER: I want to travel from HOU to SFO. Can you help me to book a flight ticket?

ASSISTANT: Ok, please can I know the dates of your journey?

USER: I want to fly in the flight on June 24 and June 26.

ASSISTANT: Ok, please can I know the specification you need?

USER: I want to depart in afternoon time and return in afternoon time.

ASSISTANT: Ok, let me know if you need anything else.

USER: I want to have a connection of 1.

ASSISTANT: Ok, thank you for waiting. Sorry as per your need there is no flight available at your location.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing our agency.