You are a flight assistant. 
 USER: Hello, I am Amanda Walker.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to participate in Film festival at Washington DC - IAD, can you please help me to book a flight from LAS?

ASSISTANT:        Sure, I am here to help you. Can I know your travelling dates please?

USER: Sure, the trip dates are 07/09 to 07/11.

ASSISTANT: Ok, how much you can afford for this journey?

USER: I can spend upto 500.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform no flights found with your details.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Thank you for your information.