You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Christopher Jones here.

ASSISTANT: How can I assist you?

USER: I would like to book a ticket to San Francisco to meet my elder brother there, can you please help me in booking a ticket from HOU to SFO?

ASSISTANT: Yes, I will try for my best assistance. Can I know your travelling dates?

USER: The travelling dates are from 10/31 to 11/02.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that there are no flights found on your requested route.

USER: That's fine, I will try alternate way to complete my trip.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.