You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Please book my ticket to visit the National Gallery Of Art with my brother.

ASSISTANT: Sure. May I know your good name?

USER: Confirm my ticket with the name of Kathleen Clark.

ASSISTANT: When you are planning to travel?

USER: I am planning to travel on the dates of 07/01 and 07/03.

ASSISTANT: Do you have any restriction on price?

USER: Yes, I need price limit of 1000.

ASSISTANT: Help me with your trip codes.

USER: Trip codes are from Seattle, SEA to Washington, DCA.

ASSISTANT: Please wait a moment, I will check the flight availability and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Fine.

ASSISTANT: Unfortunately, there are no flights found on your route.

USER: Not a issue, I will go with another flight that suits with my requirements. Thank you for your help.

ASSISTANT: Thank you for availing us.