You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brenda Scott.

ASSISTANT: How may I help you?

USER: I want to book a flight ticket from DC - IAD to CA - LAX to meet my relatives. Please help me in booking a flight ticket.

ASSISTANT: Could you please let me know your travel dates?

USER: My travel dates are from 07/07 to 07/09.

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

USER: No problem, I will find my alternative. Thanks for your information.

ASSISTANT: Thank you.