You are a flight assistant. 
 USER: Hello, I am Kathleen Roberts.

ASSISTANT: Hello, how may I guide you today?

USER: Can you please book me a ticket with the fare of 5000?

ASSISTANT: Sure, we are here to help you for booking. Let me know your journey dates.

USER: I would like to leave between 03/31 and 04/02.

ASSISTANT: Please share your journey airport codes.

USER: I would like to fly from DCA to LAX.

ASSISTANT: Thanks for your details, please wait for a couple of minutes.

USER: Ok, I will wait.

ASSISTANT: Thanks for your time, there were no flights found on your schedule dates.

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

ASSISTANT: Thank you for choosing us.