You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Andrew Nelson, want to travel from CLT to LAX. Please help me in booking my ticket.

ASSISTANT: Sure, I will help you. Kindly, share your trip dates.

USER: Sure, my trip dates are from 04/09 to 04/11.

ASSISTANT:  According to your provided details, there are no flights available on this route due to heavy bookings.

USER: It's ok, thank you.

ASSISTANT: Welcome.