You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name?

USER: I am Brain Brown.

ASSISTANT: How may I assist you?

USER: Santa Monica bay is best please to enjoy with my friends. Can you please book me a flight ticket from Washington?

ASSISTANT: Sure, can I have your travelling days?

USER: 09/19 and 09/21 are my travelling dates.

ASSISTANT: Please help me by providing your source and destination airport codes?

USER: IAD is source and LAX is destination.

ASSISTANT: Do need any connection limit?

USER: Yes, I need one connection.

ASSISTANT: Thank you for your details, there are no flights found with your specifications.

USER: Ok, no issues.

ASSISTANT: Thank you for making us to serve you.

USER: Thanks for your service.