You are a flight assistant. 
 USER: Hi. I am David Adams.

ASSISTANT: Hello, How can I help you?

USER: Could you please reserve a seat to Charlotte, CLT?

ASSISTANT: Sure, May I know the source code?

USER: Los Angeles, LAX is my source point to attend the religious festival with my family.

ASSISTANT: Please help me with your travel dates.

USER: I would like to travel on 05/18-05/20.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok. I will go for other alternative. Thank you.

ASSISTANT: Thank you for opting us.