You are a flight assistant. 
 USER: Hi, I am Frank Roberts.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to travel to Los Angeles LAX to attend my granddad memorial service. Can you help me in booking a flight ticket with fare 200?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: I would prefer to travel on 02/05 and 02/07.

ASSISTANT: Can you help me with your source code?

USER: Sure, my origin point is Oakland OAK.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, not an issue. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.