You are a flight assistant. 
 USER: Hello. I am Gregory Perez.

ASSISTANT: Hello, how may I assist you?

USER: I need to attend my grand father funeral services at Los Angeles.

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

USER: Could you please help me with booking a flight ticket from Houston?

ASSISTANT: Yes, I can help you.

USER: Sure, I want to depart on Jan 26 and arrive on Jan 28.

ASSISTANT: Ok, can I know your nearest airport codes?

USER: My airport codes are IAH and LAX.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for consulting us.