You are a flight assistant. 
 USER: Hello,. I am Mark Wright.

ASSISTANT: Hello, how may I serve you today?

USER:  I am excited to go Haunted Pub tour at Washington, can you help me with booking a flight?

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: Can you please share your journey dates that you prefer to travel?

USER: I want to travel on 02/04, and need to catch return flight on 02/06.

ASSISTANT: Kindly assign your boarding and landing airport codes?

USER: I need to leave from my nearest airport ATL to reach DCA.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need a stopover.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for approaching us. Have a good day.