You are a flight assistant. 
 USER: Hello, I am Melissa Clark from Washington.

ASSISTANT: Hello, how can I assist you?

USER: As I am a Doctor, I want to attend an emergency surgery in Los Angeles, CA-LAX. So I need a direct flight, Can you please be my helping hand?

ASSISTANT: Sure, we would be happy to help you.

USER: Thank you.

ASSISTANT: Can you please help me with the airport code of Washington?

USER: At Washington, DC-IAD is my boarding airport code.

ASSISTANT: Ok, do you have any restriction in price?

USER: My price limit is 1000.

ASSISTANT: When do you need to travel?

USER: My journey dates are from 08/30 to 09/01.

ASSISTANT: Thank you for sharing your details, please wait a moment.

USER: Sure.

ASSISTANT: Melissa, there is no direct flight available on your route.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.