You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can  I know your good name?

USER: Sure, I am John Evans.

ASSISTANT: How may I oblige you today?

USER: As I am a private detective, I would like to visit Library of Congress at Washington to collect some information from old Newspapers, which can help me with my investigation. So, could you please assist me in booking a flight ticket to Washington, DC-DCA?

ASSISTANT:  Sure, we are euphoric to help you.

USER: Thank you for your response.

ASSISTANT: On which dates would you like to travel?

USER: I need to go on 06/09 and intend to back on 06/11.

ASSISTANT: Do you have any restriction in connection limit?

USER: Yes, I prefer a direct flight as it is a urgent case.

ASSISTANT: May I know which airport is nearest to you?

USER: I would like to catch my flight from Austin, TX-AUS.

ASSISTANT: Give me a minute. I will check the availability of flights and get back to you.

USER: Sure, take your own time to check.

ASSISTANT: Thanks for being waiting. Sorry for the inconvenience, there are no airlines providing you the service on your desired routes.

USER: Not an issue, I will choose an alternative to reach my destination.

ASSISTANT: Thank you for spending your valuable time.

USER: Thank you for your information.