You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please book me a flight ticket from HOU to SFO to meet my family?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I have planned to travel on Mar 19th and return on Mar 21st.

ASSISTANT: Do you have any other specifications?

USER: I like one connecting flight.

ASSISTANT: Please help me with your name for booking.

USER: Gary Carter.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Most welcome.